diff --git a/kfet/static/kfet/css/history.css b/kfet/static/kfet/css/history.css
index 976f5782..fc6a46ad 100644
--- a/kfet/static/kfet/css/history.css
+++ b/kfet/static/kfet/css/history.css
@@ -40,6 +40,11 @@
     width:90px;
 }
 
+#history .opegroup .infos {
+    text-align:center;
+    width:145px;
+}
+
 #history .opegroup .valid_by {
     padding-left:20px
 }
@@ -67,6 +72,10 @@
     text-align:right;
 }
 
+#history .ope .glyphicon {
+    padding-left:15px;
+}
+
 #history .ope .infos2 {
     padding-left:15px;
 }
diff --git a/kfet/static/kfet/js/history.js b/kfet/static/kfet/js/history.js
index 7deb407d..599dd9c6 100644
--- a/kfet/static/kfet/js/history.js
+++ b/kfet/static/kfet/js/history.js
@@ -34,10 +34,22 @@ function KHistory(options={}) {
 
         var trigramme = opegroup['on_acc_trigramme'];
         var is_cof    = opegroup['is_cof'];
-        for (var i=0; i<opegroup['opes'].length; i++) {
-            var $ope = this._opeHtml(opegroup['opes'][i], is_cof, trigramme);
-            $ope.data('opegroup', opegroup['id']);
-            $opegroup.after($ope);
+        var type      = opegroup['type']
+        switch (type) {
+            case 'opegroup':
+                for (var i=0; i<opegroup['opes'].length; i++) {
+                    var $ope = this._opeHtml(opegroup['opes'][i], is_cof, trigramme);
+                    $ope.data('opegroup', opegroup['id']);
+                    $opegroup.after($ope);
+                }
+                break;
+            case 'transfergroup':
+                for (var i=0; i<opegroup['opes'].length; i++) {
+                    var $transfer = this._transferHtml(opegroup['opes'][i]);
+                    $transfer.data('transfergroup', opegroup['id']);
+                    $opegroup.after($transfer);
+                }
+                break;
         }
     }
 
@@ -60,7 +72,8 @@ function KHistory(options={}) {
         }
 
         $ope_html
-            .data('ope', ope['id'])
+            .data('type', 'ope')
+            .data('id', ope['id'])
             .find('.amount').text(amount).end()
             .find('.infos1').text(infos1).end()
             .find('.infos2').text(infos2).end();
@@ -68,7 +81,7 @@ function KHistory(options={}) {
         var addcost_for = ope['addcost_for__trigramme'];
         if (addcost_for) {
             var addcost_amount = parseFloat(ope['addcost_amount']);
-            $ope_html.find('.addcost').text('('+amountDisplay(addcost_amount, is_cof)+'UKF pour '+addcost_for+')');
+            $ope_html.find('.addcost').text('('+amountDisplay(addcost_amount, is_cof)+' UKF pour '+addcost_for+')');
         }
 
         if (ope['canceled_at'])
@@ -77,9 +90,28 @@ function KHistory(options={}) {
         return $ope_html;
     }
 
+    this._transferHtml = function(transfer) {
+        var $transfer_html = $(this.template_transfer);
+        var parsed_amount = parseFloat(transfer['amount']);
+        var amount = parsed_amount.toFixed(2) + '€';
+
+        $transfer_html
+            .data('type', 'transfer')
+            .data('id', transfer['id'])
+            .find('.amount').text(amount).end()
+            .find('.infos1').text(transfer['from_acc']).end()
+            .find('.infos2').text(transfer['to_acc']).end();
+
+        if (transfer['canceled_at'])
+            this.cancelOpe(transfer, $transfer_html);
+
+        return $transfer_html ;
+            
+    }
+
     this.cancelOpe = function(ope, $ope = null) {
         if (!$ope)
-            $ope = this.findOpe(ope['id']);
+            $ope = this.findOpe(ope['id'], ope['type']);
 
         var cancel = 'Annulé';
         var canceled_at = dateUTCToParis(ope['canceled_at']);
@@ -91,23 +123,39 @@ function KHistory(options={}) {
     }
 
     this._opeGroupHtml = function(opegroup) {
-        var $opegroup_html = $(this.template_opegroup);
+
+        var type = opegroup['type'];
+
+        
+        switch (type) {
+            case 'opegroup':
+                var $opegroup_html = $(this.template_opegroup);
+                var trigramme = opegroup['on_acc__trigramme'];
+                var amount    = amountDisplay(
+                        parseFloat(opegroup['amount']), opegroup['is_cof'], trigramme);
+                break;
+            case 'transfergroup':
+                var $opegroup_html = $(this.template_transfergroup);
+                $opegroup_html.find('.infos').text('Transferts').end()
+                var trigramme = '';
+                var amount = '' ;
+                break;
+        }
 
         var at        = dateUTCToParis(opegroup['at']).format('HH:mm:ss');
-        var trigramme = opegroup['on_acc__trigramme'];
-        var amount    = amountDisplay(
-                parseFloat(opegroup['amount']), opegroup['is_cof'], trigramme);
         var comment = opegroup['comment'] || '';
 
         $opegroup_html
-            .data('opegroup', opegroup['id'])
+            .data('type',  type)
+            .data('id', opegroup['id'])
             .find('.time').text(at).end()
+            .find('.trigramme').text(trigramme).end()
             .find('.amount').text(amount).end()
-            .find('.comment').text(comment).end()
-            .find('.trigramme').text(trigramme).end();
+            .find('.comment').text(comment).end();
 
         if (!this.display_trigramme)
             $opegroup_html.find('.trigramme').remove();
+            $opegroup_html.find('.info').remove();
 
         if (opegroup['valid_by__trigramme'])
             $opegroup_html.find('.valid_by').text('Par '+opegroup['valid_by__trigramme']);
@@ -133,9 +181,9 @@ function KHistory(options={}) {
         });
     }
 
-    this.findOpe = function(id) {
+    this.findOpe = function(id, type='ope') {
         return this.$container.find('.ope').filter(function() {
-            return $(this).data('ope') == id
+            return ($(this).data('id') == id && $(this).data('type') == type)
         });
     }
 
@@ -153,6 +201,8 @@ KHistory.default_options = {
     container: '#history',
     template_day: '<div class="day"></div>',
     template_opegroup: '<div class="opegroup"><span class="time"></span><span class="trigramme"></span><span class="amount"></span><span class="valid_by"></span><span class="comment"></span></div>',
+    template_transfergroup: '<div class="opegroup"><span class="time"></span><span class="infos"></span><span class="valid_by"></span><span class="comment"></span></div>',
     template_ope: '<div class="ope"><span class="amount"></span><span class="infos1"></span><span class="infos2"></span><span class="addcost"></span><span class="canceled"></span></div>',
+    template_transfer: '<div class="ope"><span class="amount"></span><span class="infos1"></span><span class="glyphicon glyphicon-arrow-right"></span><span class="infos2"></span><span class="canceled"></span></div>',
     display_trigramme: true,
 }
diff --git a/kfet/static/kfet/js/kfet.js b/kfet/static/kfet/js/kfet.js
index 455d2d95..aa58d1ce 100644
--- a/kfet/static/kfet/js/kfet.js
+++ b/kfet/static/kfet/js/kfet.js
@@ -165,3 +165,9 @@ function requestAuth(data, callback, focus_next = null) {
 
     });
 }
+
+String.prototype.pluralize = function(count, irreg_plural = false) {
+    if (Math.abs(count) >= 2)
+        return irreg_plural ? irreg_plural : this+'s' ;
+    return this ;
+}
diff --git a/kfet/templates/kfet/history.html b/kfet/templates/kfet/history.html
index 091b4f2f..78f8ddea 100644
--- a/kfet/templates/kfet/history.html
+++ b/kfet/templates/kfet/history.html
@@ -7,6 +7,7 @@
 <link rel="stylesheet" type="text/css" href="{% static 'kfet/css/bootstrap-datetimepicker.min.css' %}">
 <link rel="stylesheet" type="text/css" href="{% static 'kfet/css/multiple-select.css' %}">
 <script type="text/javascript" src="{% static 'kfet/js/js.cookie.js' %}"></script>
+<script type="text/javascript" src="{% static 'kfet/js/reconnecting-websocket.js' %}"></script>
 <script type="text/javascript" src="{% static 'kfet/js/jquery-ui.min.js' %}"></script>
 <script type="text/javascript" src="{% static 'kfet/js/jquery-confirm.js' %}"></script>
 <script type="text/javascript" src="{% static 'kfet/js/moment.js' %}"></script>
@@ -62,6 +63,8 @@
 $(document).ready(function() {
     settings = { 'subvention_cof': parseFloat({{ settings.subvention_cof|unlocalize }})}
 
+    lock = 0 ;
+
     khistory = new KHistory();
 
     var $from_date = $('#from_date');
@@ -142,9 +145,10 @@ $(document).ready(function() {
         selected: function(e, ui) {
             $(ui.selected).each(function() {
                 if ($(this).hasClass('opegroup')) {
-                    var opegroup = $(this).data('opegroup');
+                    var type = $(this).data('type');
+                    var id = $(this).data('id');
                     $(this).siblings('.ope').filter(function() {
-                        return $(this).data('opegroup') == opegroup
+                        return $(this).data(type) == id
                     }).addClass('ui-selected');
                 }
             });
@@ -156,7 +160,7 @@ $(document).ready(function() {
             // DEL (Suppr)
             var opes_to_cancel = [];
             khistory.$container.find('.ope.ui-selected').each(function () {
-                opes_to_cancel.push($(this).data('ope'));
+                opes_to_cancel.push($(this).data('type')+' '+$(this).data('id'));
             });
             if (opes_to_cancel.length > 0)
                 confirmCancel(opes_to_cancel);
@@ -165,7 +169,7 @@ $(document).ready(function() {
 
     function confirmCancel(opes_to_cancel) {
         var nb = opes_to_cancel.length;
-        var content = nb+" opérations vont être annulées";
+        var content = nb+' opération va être annulée'.pluralize(nb, ' opérations vont être annulées')
         $.confirm({
             title: 'Confirmation',
             content: content,
@@ -179,50 +183,10 @@ $(document).ready(function() {
         });
     }
 
-    function requestAuth(data, callback) {
-        var content = getErrorsHtml(data);
-        content += '<input type="password" name="password" autofocus>',
-        $.confirm({
-            title: 'Authentification requise',
-            content: content,
-            backgroundDismiss: true,
-            animation:'top',
-            closeAnimation:'bottom',
-            keyboardEnabled: true,
-            confirm: function() {
-                var password = this.$content.find('input').val();
-                callback(password);
-            },
-            onOpen: function() {
-                var that = this;
-                this.$content.find('input').on('keypress', function(e) {
-                    if (e.keyCode == 13)
-                        that.$confirmButton.click();
-                });
-            },
-        });
-    }
-
-    function getErrorsHtml(data) {
-        var content = '';
-        if ('missing_perms' in data['errors']) {
-            content += 'Permissions manquantes';
-            content += '<ul>';
-            for (var i=0; i<data['errors']['missing_perms'].length; i++)
-                content += '<li>'+data['errors']['missing_perms'][i]+'</li>';
-            content += '</ul>';
-        }
-        if ('negative' in data['errors']) {
-            var url_base = "{% url 'kfet.account.update' LIQ}";
-            url_base = base_url(0, url_base.length-8);
-            for (var i=0; i<data['errors']['negative'].length; i++) {
-                content += '<a class="btn btn-primary" href="'+url_base+data['errors']['negative'][i]+'/edit" target="_blank">Autorisation de négatif requise pour '+data['errors']['negative'][i]+'</a>';
-            }
-        }
-        return content;
-    }
-
     function cancelOperations(opes_array, password = '') {
+        if (lock == 1)
+            return false
+        lock = 1 ;
         var data = { 'operations' : opes_array }
         $.ajax({
             dataType: "json",
@@ -238,6 +202,7 @@ $(document).ready(function() {
         })
         .done(function(data) {
             khistory.$container.find('.ui-selected').removeClass('ui-selected');
+            lock = 0 ;
         })
         .fail(function($xhr) {
             var data = $xhr.responseJSON;
@@ -251,10 +216,37 @@ $(document).ready(function() {
                     displayErrors(getErrorsHtml(data));
                     break;
             }
+            lock = 0 ;
 
         });
     }
 
+    // -----
+    // Synchronization
+    // -----
+
+
+    websocket_msg_default = {'opegroups':[],'opes':[]}
+
+    var websocket_protocol = window.location.protocol == 'https:' ? 'wss' : 'ws';
+    var location_host = window.location.host;
+    var location_url = window.location.pathname.startsWith('/gestion/') ? location_host + '/gestion' : location_host;
+    socket = new ReconnectingWebSocket(websocket_protocol+"://" + location_url + "/ws/k-fet/k-psul/");
+    socket.onmessage = function(e) {
+        data = $.extend({}, websocket_msg_default, JSON.parse(e.data));
+
+        for (var i=0; i<data['opegroups'].length; i++) {
+            if (data['opegroups'][i]['cancellation']) {
+                khistory.cancelOpeGroup(data['opegroups'][i]);
+            }
+        }
+        for (var i=0; i<data['opes'].length; i++) {
+            if (data['opes'][i]['cancellation']) {
+                khistory.cancelOpe(data['opes'][i]);
+            }
+        }
+    }
+
 
     getHistory();
 });
diff --git a/kfet/templates/kfet/kpsul.html b/kfet/templates/kfet/kpsul.html
index 43a55dd2..216c7f74 100644
--- a/kfet/templates/kfet/kpsul.html
+++ b/kfet/templates/kfet/kpsul.html
@@ -765,7 +765,7 @@ $(document).ready(function() {
             // DEL (Suppr)
             var opes_to_cancel = [];
             khistory.$container.find('.ope.ui-selected').each(function () {
-                opes_to_cancel.push($(this).data('ope'));
+                opes_to_cancel.push($(this).data('type')+' '+$(this).data('id'));
             });
             if (opes_to_cancel.length > 0)
                 cancelOperations(opes_to_cancel);
diff --git a/kfet/templates/kfet/transfers.html b/kfet/templates/kfet/transfers.html
index cbdf0fe3..a580709f 100644
--- a/kfet/templates/kfet/transfers.html
+++ b/kfet/templates/kfet/transfers.html
@@ -4,9 +4,14 @@
 {% block extra_head %}
 <link rel="stylesheet" style="text/css" href="{% static 'kfet/css/jquery-ui.min.css' %}">
 <script type="text/javascript" src="{% static 'kfet/js/js.cookie.js' %}"></script>
+<script type="text/javascript" src="{% static 'kfet/js/reconnecting-websocket.js' %}"></script>
 <script type="text/javascript" src="{% static 'kfet/js/jquery-ui.min.js' %}"></script>
 <script type="text/javascript" src="{% static 'kfet/js/jquery-confirm.js' %}"></script>
+<script type="text/javascript" src="{% static 'kfet/js/moment.js' %}"></script>
+<script type="text/javascript" src="{% static 'kfet/js/moment-fr.js' %}"></script>
+<script type="text/javascript" src="{% static 'kfet/js/moment-timezone-with-data-2010-2020.js' %}"></script>
 <script type="text/javascript" src="{% static 'kfet/js/kfet.js' %}"></script>
+<script type="text/javascript" src="{% static 'kfet/js/history.js' %}"></script>
 {% endblock %}
 
 {% block title %}Transferts{% endblock %}
@@ -31,22 +36,7 @@
     <div class="content-right">
       <div class="content-right-block">
         <h2>Liste des transferts</h2>
-        <div id="history">
-          {% for transfergroup in transfergroups %}
-            <div class="opegroup transfergroup" data-transfergroup="{{ transfergroup.pk }}">
-              <span>{{ transfergroup.at }}</span>
-              <span>{{ transfergroup.valid_by.trigramme }}</span>
-              <span>{{ transfergroup.comment }}</span>
-            </div>
-            {% for transfer in transfergroup.transfers.all %}
-            <div class="ope transfer{% if transfer.canceled_at %} canceled{% endif %}" data-transfer="{{ transfer.pk }}" data-transfergroup="{{ transfergroup.pk }}">
-                <span class="amount">{{ transfer.amount }} €</span>
-                <span class="from_acc">{{ transfer.from_acc.trigramme }}</span>
-                <span class="glyphicon glyphicon-arrow-right"></span>
-                <span class="to_acc">{{ transfer.to_acc.trigramme }}</span>
-              </div>
-            {% endfor %}
-          {% endfor %}
+        <table id="history" class="table">
         </table>
       </div>
     </div>
@@ -70,15 +60,80 @@ $(document).ready(function() {
         });
     }
 
+    khistory = new KHistory({
+        display_trigramme: false,
+    });
+
+    function getHistory() {
+        var data = {'transfersonly': true};
 
-    function cancelTransfers(transfers_array, password = '') {
-        if (lock == 1)
-            return false
-        lock = 1;
-        var data = { 'transfers' : transfers_array }
         $.ajax({
             dataType: "json",
-            url     : "{% url 'kfet.transfers.cancel' %}",
+            url     : "{% url 'kfet.history.json' %}",
+            method  : "POST",
+            data    : data,
+        })
+        .done(function(data) {
+            for (var i=0; i<data['opegroups'].length; i++) {
+                khistory.addOpeGroup(data['opegroups'][i]);
+            }
+        });
+    }
+
+    khistory.$container.selectable({
+        filter: 'div.opegroup, div.ope',
+        selected: function(e, ui) {
+            $(ui.selected).each(function() {
+                if ($(this).hasClass('opegroup')) {
+                    var type = $(this).data('type');
+                    var id = $(this).data('id');
+                    $(this).siblings('.ope').filter(function() {
+                        return $(this).data(type) == id
+                    }).addClass('ui-selected');
+                }
+            });
+        },
+    });
+    
+    $(document).on('keydown', function (e) {
+        if (e.keyCode == 46) {
+            // DEL (Suppr)
+            var opes_to_cancel = [];
+            khistory.$container.find('.ope.ui-selected').each(function () {
+                opes_to_cancel.push($(this).data('type')+' '+$(this).data('id'));
+            });
+            if (opes_to_cancel.length > 0)
+                confirmCancel(opes_to_cancel);
+        }
+    });
+
+    function confirmCancel(opes_to_cancel) {
+        var nb = opes_to_cancel.length;
+        var content = nb+' opération'.pluralize(nb)
+                        +' va'.pluralize(nb, ' vont')
+                        + ' être'
+                        + ' annulée'.pluralize(nb);
+        $.confirm({
+            title: 'Confirmation',
+            content: content,
+            backgroundDismiss: true,
+            animation: 'top',
+            closeAnimation: 'bottom',
+            keyboardEnabled: true,
+            confirm: function() {
+                cancelOperations(opes_to_cancel);
+            }
+        });
+    }
+
+    function cancelOperations(opes_array, password = '') {
+        if (lock == 1)
+            return false
+        lock = 1 ;
+        var data = { 'operations' : opes_array }
+        $.ajax({
+            dataType: "json",
+            url     : "{% url 'kfet.kpsul.cancel_operations' %}",
             method  : "POST",
             data    : data,
             beforeSend: function ($xhr) {
@@ -89,11 +144,7 @@ $(document).ready(function() {
 
         })
         .done(function(data) {
-            for (var i=0; i<data['canceled'].length; i++) {
-                $('#history').find('.transfer[data-transfer='+data['canceled'][i]+']')
-                    .addClass('canceled');
-            }
-            $('#history').find('.ui-selected').removeClass('ui-selected');
+            khistory.$container.find('.ui-selected').removeClass('ui-selected');
             lock = 0;
         })
         .fail(function($xhr) {
@@ -101,7 +152,7 @@ $(document).ready(function() {
             switch ($xhr.status) {
                 case 403:
                     requestAuth(data, function(password) {
-                        cancelTransfers(transfers_array, password);
+                        cancelOperations(opes_array, password);
                     });
                     break;
                 case 400:
@@ -112,31 +163,28 @@ $(document).ready(function() {
         });
     }
 
-    $('#history').selectable({
-        filter: 'div.transfergroup, div.transfer',
-        selected: function(e, ui) {
-            $(ui.selected).each(function() {
-                if ($(this).hasClass('transfergroup')) {
-                    var transfergroup = $(this).attr('data-transfergroup');
-                    $(this).siblings('.ope').filter(function() {
-                        return $(this).attr('data-transfergroup') == transfergroup
-                    }).addClass('ui-selected');
-                }
-            });
-        },
-    });
+    // -----
+    // Synchronization
+    // -----
 
-    $(document).on('keydown', function (e) {
-        if (e.keyCode == 46) {
-            // DEL (Suppr)
-            var transfers_to_cancel = [];
-            $('#history').find('.transfer.ui-selected').each(function () {
-                transfers_to_cancel.push($(this).attr('data-transfer'));
-            });
-            if (transfers_to_cancel.length > 0)
-                cancelTransfers(transfers_to_cancel);
+
+    websocket_msg_default = {'opes':[]}
+
+    var websocket_protocol = window.location.protocol == 'https:' ? 'wss' : 'ws';
+    var location_host = window.location.host;
+    var location_url = window.location.pathname.startsWith('/gestion/') ? location_host + '/gestion' : location_host;
+    socket = new ReconnectingWebSocket(websocket_protocol+"://" + location_url + "/ws/k-fet/k-psul/");
+    socket.onmessage = function(e) {
+        data = $.extend({}, websocket_msg_default, JSON.parse(e.data));
+
+        for (var i=0; i<data['opes'].length; i++) {
+            if (data['opes'][i]['cancellation']) {
+                khistory.cancelOpe(data['opes'][i]);
+            }
         }
-    });
+    }
+
+    getHistory();
 
 });
 
diff --git a/kfet/urls.py b/kfet/urls.py
index e5536509..e35af90a 100644
--- a/kfet/urls.py
+++ b/kfet/urls.py
@@ -175,8 +175,6 @@ urlpatterns = [
         name='kfet.transfers.create'),
     url(r'^transfers/perform$', views.perform_transfers,
         name='kfet.transfers.perform'),
-    url(r'^transfers/cancel$', views.cancel_transfers,
-        name='kfet.transfers.cancel'),
 
     # -----
     # Inventories urls
diff --git a/kfet/views.py b/kfet/views.py
index 50704f6d..760949ea 100644
--- a/kfet/views.py
+++ b/kfet/views.py
@@ -19,7 +19,7 @@ from django.http import HttpResponse, JsonResponse, Http404
 from django.forms import modelformset_factory, formset_factory
 from django.forms.models import model_to_dict
 from django.db import IntegrityError, transaction
-from django.db.models import F, Sum, Prefetch, Count, Func
+from django.db.models import Q, F, Sum, Prefetch, Count, Func
 from django.db.models.functions import Coalesce
 from django.utils import timezone
 from django.utils.crypto import get_random_string
@@ -27,7 +27,7 @@ from gestioncof.models import CofProfile, Clipper
 from kfet.decorators import teamkfet_required
 from kfet.models import (Account, Checkout, Article, Settings, AccountNegative,
     CheckoutStatement, GenericTeamToken, Supplier, SupplierArticle, Inventory,
-    InventoryArticle, Order, OrderArticle)
+    InventoryArticle, Order, OrderArticle, TransferGroup, Transfer)
 from kfet.forms import *
 from collections import defaultdict
 from kfet import consumers
@@ -1052,6 +1052,7 @@ def kpsul_perform_operations(request):
     websocket_data = {}
     websocket_data['opegroups'] = [{
         'add': True,
+        'type': 'opegroup',
         'id': operationgroup.pk,
         'amount': operationgroup.amount,
         'checkout__name': operationgroup.checkout.name,
@@ -1093,40 +1094,66 @@ def kpsul_perform_operations(request):
     consumers.KPsul.group_send('kfet.kpsul', websocket_data)
     return JsonResponse(data)
 
+
 @teamkfet_required
 def kpsul_cancel_operations(request):
     # Pour la réponse
-    data = { 'canceled': [], 'warnings': {}, 'errors': {}}
+    data = {'canceled': {}, 'warnings': {}, 'errors': {}}
 
     # Checking if BAD REQUEST (opes_pk not int or not existing)
     try:
         # Set pour virer les doublons
-        opes_post = set(map(int, filter(None, request.POST.getlist('operations[]', []))))
+        opes_post = set(map(lambda s: int(s.split()[1]),
+                            filter(lambda s: s.split()[0] == 'ope',
+                                   request.POST.getlist('operations[]', []))))
+        transfers_post = \
+            set(map(lambda s: int(s.split()[1]),
+                    filter(lambda s: s.split()[0] == 'transfer',
+                           request.POST.getlist('operations[]', []))))
     except ValueError:
         return JsonResponse(data, status=400)
+
     opes_all = (
         Operation.objects
         .select_related('group', 'group__on_acc', 'group__on_acc__negative')
         .filter(pk__in=opes_post))
-    opes_pk  = [ ope.pk for ope in opes_all ]
-    opes_notexisting = [ ope for ope in opes_post if ope not in opes_pk ]
-    if opes_notexisting:
-        data['errors']['opes_notexisting'] = opes_notexisting
+    opes_pk = [ope.pk for ope in opes_all]
+    opes_notexisting = [ope for ope in opes_post if ope not in opes_pk]
+
+    transfers_all = (
+        Transfer.objects
+        .select_related('group', 'from_acc', 'from_acc__negative',
+                        'to_acc', 'to_acc__negative')
+        .filter(pk__in=transfers_post))
+    transfers_pk = [transfer.pk for transfer in transfers_all]
+    transfers_notexisting = [transfer for transfer in transfers_post
+                             if transfer not in transfers_pk]
+
+    if transfers_notexisting or opes_notexisting:
+        if transfers_notexisting:
+            data['errors']['transfers_notexisting'] = transfers_notexisting
+        if opes_notexisting:
+            data['errors']['opes_notexisting'] = opes_notexisting
         return JsonResponse(data, status=400)
 
-    opes_already_canceled = [] # Déjà annulée
-    opes = [] # Pas déjà annulée
+    already_canceled = {}  # Opération/Transfert déjà annulé
+    opes = []  # Pas déjà annulée
+    transfers = []
     required_perms = set()
-    stop_all  = False
+    stop_all = False
     cancel_duration = Settings.CANCEL_DURATION()
-    to_accounts_balances  = defaultdict(lambda:0) # Modifs à faire sur les balances des comptes
-    to_groups_amounts     = defaultdict(lambda:0) # ------ sur les montants des groupes d'opé
-    to_checkouts_balances = defaultdict(lambda:0) # ------ sur les balances de caisses
-    to_articles_stocks    = defaultdict(lambda:0) # ------ sur les stocks d'articles
+    # Modifs à faire sur les balances des comptes
+    to_accounts_balances = defaultdict(lambda: 0)
+    # ------ sur les montants des groupes d'opé
+    to_groups_amounts = defaultdict(lambda: 0)
+    # ------ sur les balances de caisses
+    to_checkouts_balances = defaultdict(lambda: 0)
+    # ------ sur les stocks d'articles
+    to_articles_stocks = defaultdict(lambda: 0)
     for ope in opes_all:
         if ope.canceled_at:
             # Opération déjà annulée, va pour un warning en Response
-            opes_already_canceled.append(ope.pk)
+            already_canceled['opes'].append(ope.pk)
         else:
             opes.append(ope.pk)
             # Si opé il y a plus de CANCEL_DURATION, permission requise
@@ -1153,14 +1180,15 @@ def kpsul_cancel_operations(request):
             #        par `.save()`, amount_error est recalculé automatiquement,
             #        ce qui n'est pas le cas en faisant un update sur queryset
             # TODO ? : Maj les balance_old de relevés pour modifier l'erreur
-            last_statement = (CheckoutStatement.objects
-                    .filter(checkout=ope.group.checkout)
-                    .order_by('at')
-                    .last())
+            last_statement = \
+                (CheckoutStatement.objects
+                                  .filter(checkout=ope.group.checkout)
+                                  .order_by('at')
+                                  .last())
             if not last_statement or last_statement.at < ope.group.at:
                 if ope.type == Operation.PURCHASE:
                     if ope.group.on_acc.is_cash:
-                        to_checkouts_balances[ope.group.checkout] -= - ope.amount
+                        to_checkouts_balances[ope.group.checkout] -= -ope.amount
                 else:
                     to_checkouts_balances[ope.group.checkout] -= ope.amount
 
@@ -1173,22 +1201,38 @@ def kpsul_cancel_operations(request):
             #        est recalculé automatiquement
             if ope.article and ope.article_nb:
                 last_stock = (InventoryArticle.objects
-                    .select_related('inventory')
-                    .filter(article=ope.article)
-                    .order_by('inventory__at')
-                    .last())
+                                              .select_related('inventory')
+                                              .filter(article=ope.article)
+                                              .order_by('inventory__at')
+                                              .last())
                 if not last_stock or last_stock.inventory.at < ope.group.at:
                     to_articles_stocks[ope.article] += ope.article_nb
 
-    if not opes:
-        data['warnings']['already_canceled'] = opes_already_canceled
+    for transfer in transfers_all:
+        if transfer.canceled_at:
+            # Transfert déjà annulé, va pour un warning en Response
+            already_canceled['transfers'].append(transfer.pk)
+        else:
+            transfers.append(transfer.pk)
+            # Si transfer il y a plus de CANCEL_DURATION, permission requise
+            if transfer.group.at + cancel_duration < timezone.now():
+                required_perms.add('kfet.cancel_old_operations')
+
+            # Calcul de toutes modifs à faire en cas de validation
+
+            # Pour les balances de comptes
+            to_accounts_balances[transfer.from_acc] += transfer.amount
+            to_accounts_balances[transfer.to_acc] += -transfer.amount
+
+    if not opes and not transfers:
+        data['warnings']['already_canceled'] = already_canceled
         return JsonResponse(data)
 
     negative_accounts = []
     # Checking permissions or stop
     for account in to_accounts_balances:
         (perms, stop) = account.perms_to_perform_operation(
-                amount = to_accounts_balances[account])
+                amount=to_accounts_balances[account])
         required_perms |= perms
         stop_all = stop_all or stop
         if stop:
@@ -1208,25 +1252,31 @@ def kpsul_cancel_operations(request):
     with transaction.atomic():
         (Operation.objects.filter(pk__in=opes)
             .update(canceled_by=canceled_by, canceled_at=canceled_at))
+
+        (Transfer.objects.filter(pk__in=transfers)
+            .update(canceled_by=canceled_by, canceled_at=canceled_at))
+
         for account in to_accounts_balances:
             Account.objects.filter(pk=account.pk).update(
-                balance = F('balance') + to_accounts_balances[account])
+                balance=F('balance') + to_accounts_balances[account])
         for checkout in to_checkouts_balances:
             Checkout.objects.filter(pk=checkout.pk).update(
-                balance = F('balance') + to_checkouts_balances[checkout])
+                balance=F('balance') + to_checkouts_balances[checkout])
         for group in to_groups_amounts:
             OperationGroup.objects.filter(pk=group.pk).update(
-                amount = F('amount') + to_groups_amounts[group])
+                amount=F('amount') + to_groups_amounts[group])
         for article in to_articles_stocks:
             Article.objects.filter(pk=article.pk).update(
-                stock = F('stock') + to_articles_stocks[article])
+                stock=F('stock') + to_articles_stocks[article])
 
     # Websocket data
-    websocket_data = { 'opegroups': [], 'opes': [], 'checkouts': [], 'articles': [] }
+    websocket_data = {'opegroups': [], 'opes': [],
+                      'checkouts': [], 'articles': []}
     # Need refresh from db cause we used update on querysets
-    opegroups_pk = [ opegroup.pk for opegroup in to_groups_amounts ]
+    opegroups_pk = [opegroup.pk for opegroup in to_groups_amounts]
     opegroups = (OperationGroup.objects
-        .values('id','amount','is_cof').filter(pk__in=opegroups_pk))
+                               .values('id', 'amount', 'is_cof')
+                               .filter(pk__in=opegroups_pk))
     for opegroup in opegroups:
         websocket_data['opegroups'].append({
             'cancellation': True,
@@ -1238,20 +1288,31 @@ def kpsul_cancel_operations(request):
     for ope in opes:
         websocket_data['opes'].append({
             'cancellation': True,
+            'type': 'ope',
             'id': ope,
             'canceled_by__trigramme': canceled_by__trigramme,
             'canceled_at': canceled_at,
         })
+    for ope in transfers:
+        websocket_data['opes'].append({
+            'cancellation': True,
+            'type': 'transfer',
+            'id': ope,
+            'canceled_by__trigramme': canceled_by__trigramme,
+            'canceled_at': canceled_at,
+        })
+
     # Need refresh from db cause we used update on querysets
-    checkouts_pk = [ checkout.pk for checkout in to_checkouts_balances]
+    checkouts_pk = [checkout.pk for checkout in to_checkouts_balances]
     checkouts = (Checkout.objects
-        .values('id', 'balance').filter(pk__in=checkouts_pk))
+                         .values('id', 'balance')
+                         .filter(pk__in=checkouts_pk))
     for checkout in checkouts:
         websocket_data['checkouts'].append({
             'id': checkout['id'],
             'balance': checkout['balance']})
     # Need refresh from db cause we used update on querysets
-    articles_pk = [ article.pk for articles in to_articles_stocks]
+    articles_pk = [article.pk for articles in to_articles_stocks]
     articles = Article.objects.values('id', 'stock').filter(pk__in=articles_pk)
     for article in articles:
         websocket_data['articles'].append({
@@ -1259,56 +1320,92 @@ def kpsul_cancel_operations(request):
             'stock': article['stock']})
     consumers.KPsul.group_send('kfet.kpsul', websocket_data)
 
-    data['canceled'] = opes
-    if opes_already_canceled:
-        data['warnings']['already_canceled'] = opes_already_canceled
+    data['canceled']['opes'] = opes
+    data['canceled']['transfers'] = transfers
+    if already_canceled:
+        data['warnings']['already_canceled'] = already_canceled
     return JsonResponse(data)
 
+
 @login_required
 def history_json(request):
     # Récupération des paramètres
     from_date = request.POST.get('from', None)
-    to_date   = request.POST.get('to', None)
-    limit = request.POST.get('limit', None);
+    to_date = request.POST.get('to', None)
     checkouts = request.POST.getlist('checkouts[]', None)
-    accounts  = request.POST.getlist('accounts[]', None)
+    accounts = request.POST.getlist('accounts[]', None)
+    transfers_only = request.POST.get('transfersonly', None)
 
     # Construction de la requête (sur les opérations) pour le prefetch
-    queryset_prefetch = Operation.objects.select_related(
+    ope_queryset_prefetch = Operation.objects.select_related(
             'canceled_by__trigramme', 'addcost_for__trigramme',
             'article__name')
+    ope_prefetch = Prefetch('opes',
+                            queryset=ope_queryset_prefetch)
+
+    transfer_queryset_prefetch = Transfer.objects.select_related(
+            'from_acc__trigramme', 'to_acc__trigramme',
+            'from_acc__id', 'to_acc__id',
+            'canceled_by__trigramme')
+
+    if accounts:
+        transfer_queryset_prefetch = transfer_queryset_prefetch.filter(
+                    Q(from_acc__id__in=accounts) |
+                    Q(to_acc__id__in=accounts))
+
+    if not request.user.has_perm('kfet.is_team'):
+        acc = request.user.profile.account_kfet
+        transfer_queryset_prefetch = transfer_queryset_prefetch.filter(
+                Q(from_acc=acc) | Q(to_acc=acc))
+
+    transfer_prefetch = Prefetch('transfers',
+                                 queryset=transfer_queryset_prefetch,
+                                 to_attr='filtered_transfers')
 
     # Construction de la requête principale
-    opegroups = (OperationGroup.objects
-        .prefetch_related(Prefetch('opes', queryset = queryset_prefetch))
-        .select_related('on_acc__trigramme', 'valid_by__trigramme')
-        .order_by('at')
+    opegroups = (
+        OperationGroup.objects
+                      .prefetch_related(ope_prefetch)
+                      .select_related('on_acc__trigramme',
+                                      'valid_by__trigramme')
+                      .order_by('at')
     )
+
+    transfergroups = (
+        TransferGroup.objects
+                     .prefetch_related(transfer_prefetch)
+                     .select_related('valid_by__trigramme')
+                     .order_by('at')
+    )
+
     # Application des filtres
     if from_date:
         opegroups = opegroups.filter(at__gte=from_date)
+        transfergroups = transfergroups.filter(at__gte=from_date)
     if to_date:
         opegroups = opegroups.filter(at__lt=to_date)
+        transfergroups = transfergroups.filter(at__lt=to_date)
     if checkouts:
         opegroups = opegroups.filter(checkout_id__in=checkouts)
+        transfergroups = TransferGroup.objects.none()
+    if transfers_only:
+        opegroups = OperationGroup.objects.none()
     if accounts:
         opegroups = opegroups.filter(on_acc_id__in=accounts)
     # Un non-membre de l'équipe n'a que accès à son historique
     if not request.user.has_perm('kfet.is_team'):
         opegroups = opegroups.filter(on_acc=request.user.profile.account_kfet)
-    if limit:
-        opegroups = opegroups[:limit]
-
 
     # Construction de la réponse
     ope_list = []
     for opegroup in opegroups:
         opegroup_dict = {
-            'id'         : opegroup.id,
-            'amount'     : opegroup.amount,
-            'at'         : opegroup.at,
-            'is_cof'     : opegroup.is_cof,
-            'comment'    : opegroup.comment,
+            'id': opegroup.id,
+            'type': 'opegroup',
+            'amount': opegroup.amount,
+            'at': opegroup.at,
+            'is_cof': opegroup.is_cof,
+            'comment': opegroup.comment,
             'trigramme':
                     opegroup.on_acc and opegroup.on_acc.trigramme or None,
             'day': {'id': opegroup.at.strftime('%Y%m%d'),
@@ -1319,13 +1416,13 @@ def history_json(request):
                 opegroup.valid_by and opegroup.valid_by.trigramme or None)
         for ope in opegroup.opes.all():
             ope_dict = {
-                'id'            : ope.id,
-                'type'          : ope.type,
-                'amount'        : ope.amount,
-                'article_nb'    : ope.article_nb,
-                'is_checkout'   : ope.is_checkout,
+                'id': ope.id,
+                'type': ope.type,
+                'amount': ope.amount,
+                'article_nb': ope.article_nb,
+                'is_checkout': ope.is_checkout,
                 'addcost_amount': ope.addcost_amount,
-                'canceled_at'   : ope.canceled_at,
+                'canceled_at': ope.canceled_at,
                 'article_name':
                     ope.article and ope.article.name or None,
                 'addcost_for':
@@ -1336,8 +1433,41 @@ def history_json(request):
                 ope_dict['canceled_by'] = (
                     ope.canceled_by and ope.canceled_by.trigramme or None)
             ope_list.append(ope_dict)
-    return JsonResponse(ope_list, safe=False)
 
+    for transfergroup in transfergroups:
+        if transfergroup.filtered_transfers:
+            transfergroup_dict = {
+                'id': transfergroup.id,
+                'type': 'transfergroup',
+                'at': transfergroup.at,
+                'comment': transfergroup.comment,
+                'day': {'id': transfergroup.at.strftime('%Y%m%d'),
+                        'date': transfergroup.at},
+            }
+            if request.user.has_perm('kfet.is_team'):
+                transfergroup_dict['valid_by'] = (
+                        transfergroup.valid_by and
+                        transfergroup.valid_by.trigramme or
+                        None)
+
+            for transfer in transfergroup.filtered_transfers:
+                transfer_dict = {
+                    'id': transfer.id,
+                    'type': 'transfer',
+                    'amount': transfer.amount,
+                    'canceled_at': transfer.canceled_at,
+                    'from_acc': transfer.from_acc.trigramme,
+                    'to_acc': transfer.to_acc.trigramme,
+                    'opegroup': transfergroup_dict,
+                }
+                if request.user.has_perm('kfet.is_team'):
+                    transfer_dict['canceled_by'] = (
+                            transfer.canceled_by and
+                            transfer.canceled_by.trigramme or
+                            None)
+                ope_list.append(transfer_dict)
+
+    return JsonResponse(ope_list, safe=False)
 
 @teamkfet_required
 def kpsul_articles_data(request):
@@ -1418,20 +1548,24 @@ def transfers_create(request):
     return render(request, 'kfet/transfers_create.html',
             { 'transfer_formset': transfer_formset })
 
+
 @teamkfet_required
 def perform_transfers(request):
-    data = { 'errors': {}, 'transfers': [], 'transfergroup': 0 }
+    data = {'errors': {}, 'transfers': [], 'transfergroup': 0}
 
     # Checking transfer_formset
     transfer_formset = TransferFormSet(request.POST)
     if not transfer_formset.is_valid():
-        return JsonResponse({ 'errors': list(transfer_formset.errors)}, status=400)
+        return JsonResponse({'errors': list(transfer_formset.errors)},
+                            status=400)
 
-    transfers = transfer_formset.save(commit = False)
+    transfers = transfer_formset.save(commit=False)
 
     # Initializing vars
-    required_perms = set(['kfet.add_transfer']) # Required perms to perform all transfers
-    to_accounts_balances = defaultdict(lambda:0) # For balances of accounts
+    # Required perms to perform all transfers
+    required_perms = set(['kfet.add_transfer'])
+    # For balances of accounts
+    to_accounts_balances = defaultdict(lambda: 0)
 
     for transfer in transfers:
         to_accounts_balances[transfer.from_acc] -= transfer.amount
@@ -1443,7 +1577,7 @@ def perform_transfers(request):
     # Checking if ok on all accounts
     for account in to_accounts_balances:
         (perms, stop) = account.perms_to_perform_operation(
-                amount = to_accounts_balances[account])
+                amount=to_accounts_balances[account])
         required_perms |= perms
         stop_all = stop_all or stop
         if stop:
@@ -1469,7 +1603,7 @@ def perform_transfers(request):
         # Updating balances accounts
         for account in to_accounts_balances:
             Account.objects.filter(pk=account.pk).update(
-                balance = F('balance') + to_accounts_balances[account])
+                balance=F('balance') + to_accounts_balances[account])
             account.refresh_from_db()
             if account.balance < 0:
                 if hasattr(account, 'negative'):
@@ -1478,10 +1612,10 @@ def perform_transfers(request):
                         account.negative.save()
                 else:
                     negative = AccountNegative(
-                        account = account, start = timezone.now())
+                        account=account, start=timezone.now())
                     negative.save()
-            elif (hasattr(account, 'negative')
-                    and not account.negative.balance_offset):
+            elif (hasattr(account, 'negative') and
+                  not account.negative.balance_offset):
                 account.negative.delete()
 
         # Saving transfer group
@@ -1494,106 +1628,31 @@ def perform_transfers(request):
             transfer.save()
             data['transfers'].append(transfer.pk)
 
+    # Websocket data
+    websocket_data = {}
+    websocket_data['opegroups'] = [{
+        'add': True,
+        'type': 'transfergroup',
+        'id': transfergroup.pk,
+        'at': transfergroup.at,
+        'comment': transfergroup.comment,
+        'valid_by__trigramme': (transfergroup.valid_by and
+                                transfergroup.valid_by.trigramme or None),
+        'opes': [],
+    }]
+    for transfer in transfers:
+        ope_data = {
+            'id': transfer.pk,
+            'amount': transfer.amount,
+            'from_acc': transfer.from_acc.trigramme,
+            'to_acc': transfer.to_acc.trigramme,
+            'canceled_by__trigramme': None, 'canceled_at': None,
+        }
+        websocket_data['opegroups'][0]['opes'].append(ope_data)
+
+    consumers.KPsul.group_send('kfet.kpsul', websocket_data)
     return JsonResponse(data)
 
-@teamkfet_required
-def cancel_transfers(request):
-    # Pour la réponse
-    data = { 'canceled': [], 'warnings': {}, 'errors': {}}
-
-    # Checking if BAD REQUEST (transfers_pk not int or not existing)
-    try:
-        # Set pour virer les doublons
-        transfers_post = set(map(int, filter(None, request.POST.getlist('transfers[]', []))))
-    except ValueError:
-        return JsonResponse(data, status=400)
-    transfers_all = (
-        Transfer.objects
-        .select_related('group', 'from_acc', 'from_acc__negative',
-                        'to_acc', 'to_acc__negative')
-        .filter(pk__in=transfers_post))
-    transfers_pk  = [ transfer.pk for transfer in transfers_all ]
-    transfers_notexisting = [ transfer for transfer in transfers_post
-                         if transfer not in transfers_pk ]
-    if transfers_notexisting:
-        data['errors']['transfers_notexisting'] = transfers_notexisting
-        return JsonResponse(data, status=400)
-
-    transfers_already_canceled = [] # Déjà annulée
-    transfers = [] # Pas déjà annulée
-    required_perms = set()
-    stop_all  = False
-    cancel_duration = Settings.CANCEL_DURATION()
-    to_accounts_balances  = defaultdict(lambda:0) # Modifs à faire sur les balances des comptes
-    for transfer in transfers_all:
-        if transfer.canceled_at:
-            # Transfert déjà annulé, va pour un warning en Response
-            transfers_already_canceled.append(transfer.pk)
-        else:
-            transfers.append(transfer.pk)
-            # Si transfer il y a plus de CANCEL_DURATION, permission requise
-            if transfer.group.at + cancel_duration < timezone.now():
-                required_perms.add('kfet.cancel_old_operations')
-
-            # Calcul de toutes modifs à faire en cas de validation
-
-            # Pour les balances de comptes
-            to_accounts_balances[transfer.from_acc] += transfer.amount
-            to_accounts_balances[transfer.to_acc] += -transfer.amount
-
-    if not transfers:
-        data['warnings']['already_canceled'] = transfers_already_canceled
-        return JsonResponse(data)
-
-    negative_accounts = []
-    # Checking permissions or stop
-    for account in to_accounts_balances:
-        (perms, stop) = account.perms_to_perform_operation(
-                amount = to_accounts_balances[account])
-        required_perms |= perms
-        stop_all = stop_all or stop
-        if stop:
-            negative_accounts.append(account.trigramme)
-
-    print(required_perms)
-    print(request.user.get_all_permissions())
-
-    if stop_all or not request.user.has_perms(required_perms):
-        missing_perms = get_missing_perms(required_perms, request.user)
-        if missing_perms:
-            data['errors']['missing_perms'] = missing_perms
-        if stop_all:
-            data['errors']['negative'] = negative_accounts
-        return JsonResponse(data, status=403)
-
-    canceled_by = required_perms and request.user.profile.account_kfet or None
-    canceled_at = timezone.now()
-
-    with transaction.atomic():
-        (Transfer.objects.filter(pk__in=transfers)
-            .update(canceled_by=canceled_by, canceled_at=canceled_at))
-
-        for account in to_accounts_balances:
-            Account.objects.filter(pk=account.pk).update(
-                balance = F('balance') + to_accounts_balances[account])
-            account.refresh_from_db()
-            if account.balance < 0:
-                if hasattr(account, 'negative'):
-                    if not account.negative.start:
-                        account.negative.start = timezone.now()
-                        account.negative.save()
-                else:
-                    negative = AccountNegative(
-                        account = account, start = timezone.now())
-                    negative.save()
-            elif (hasattr(account, 'negative')
-                    and not account.negative.balance_offset):
-                account.negative.delete()
-
-    data['canceled'] = transfers
-    if transfers_already_canceled:
-        data['warnings']['already_canceled'] = transfers_already_canceled
-    return JsonResponse(data)
 
 class InventoryList(ListView):
     queryset = (Inventory.objects