diff --git a/sources/Afup/Forum/Inscriptions.php b/sources/Afup/Forum/Inscriptions.php
index df1d5799c..66508d4b2 100644
--- a/sources/Afup/Forum/Inscriptions.php
+++ b/sources/Afup/Forum/Inscriptions.php
@@ -81,13 +81,21 @@ public function getRegistrationsByReference($reference)
         return $registrations;
     }
 
-    function obtenirSuivi($id_forum)
+    /**
+     * @param int $idForum
+     * @param int $idForumPrecedent
+     *
+     * @return array
+     */
+    function obtenirSuivi($idForum, $idForumPrecedent = null)
     {
         $forum = new Forum($this->_bdd);
-        $id_forum_precedent = $forum->obtenirForumPrecedent($id_forum);
+        if (null === $idForumPrecedent) {
+            $idForumPrecedent = $forum->obtenirForumPrecedent($idForum);
+        }
 
         $now = new \DateTime();
-        $dateForum = \DateTime::createFromFormat('U', $forum->obtenir($id_forum)['date_fin_vente']);
+        $dateForum = \DateTime::createFromFormat('U', $forum->obtenir($idForum)['date_fin_vente']);
 
         $daysToEndOfSales = 0;
         if ($dateForum >= $now) {
@@ -103,7 +111,7 @@ function obtenirSuivi($id_forum)
         RIGHT JOIN afup_forum_tarif aft ON (aft.id = i.type_inscription AND aft.default_price > 0)
         LEFT JOIN afup_forum af ON af.id = i.id_forum
         WHERE
-          i.id_forum IN (' . (int)$id_forum . ', ' . (int)$id_forum_precedent . ') 
+          i.id_forum IN (' . (int)$idForum . ', ' . (int)$idForumPrecedent . ') 
         AND 
           etat <> 1 
         GROUP BY jour, i.id_forum 
@@ -118,14 +126,14 @@ function obtenirSuivi($id_forum)
         $suivis = [];
 
         for($i = $nombre_par_date[0]['jour']; $i <= 0; $i++) {
-            $infoForum = array_sum(array_map(function ($info) use ($i, $id_forum) {
-                if ($info['id_forum'] == $id_forum && $info['jour'] <= $i) {
+            $infoForum = array_sum(array_map(function ($info) use ($i, $idForum) {
+                if ($info['id_forum'] == $idForum && $info['jour'] <= $i) {
                     return $info['nombre'];
                 }
                 return 0;
             }, $nombre_par_date));
-            $infoN1 = array_sum(array_map(function ($info) use ($i, $id_forum_precedent) {
-                if ($info['id_forum'] == $id_forum_precedent && $info['jour'] <= $i) {
+            $infoN1 = array_sum(array_map(function ($info) use ($i, $idForumPrecedent) {
+                if ($info['id_forum'] == $idForumPrecedent && $info['jour'] <= $i) {
                     return $info['nombre'];
                 }
                 return 0;
diff --git a/sources/AppBundle/Controller/Admin/Event/StatsAction.php b/sources/AppBundle/Controller/Admin/Event/StatsAction.php
index 1702fe26a..bdb63695f 100644
--- a/sources/AppBundle/Controller/Admin/Event/StatsAction.php
+++ b/sources/AppBundle/Controller/Admin/Event/StatsAction.php
@@ -53,12 +53,19 @@ public function __construct(
     public function __invoke(Request $request)
     {
         $id = $request->query->get('id');
+        $comparedEventId = $request->query->get('compared_event_id');
 
         $event = $this->eventActionHelper->getEventById($id);
 
         $legacyInscriptions = $this->legacyModelFactory->createObject(Inscriptions::class);
 
-        $stats = $legacyInscriptions->obtenirSuivi($event->getId());
+        $comparedSerieName = 'n-1';
+        if ($comparedEventId) {
+            $comparedEvent = $this->eventActionHelper->getEventById($comparedEventId, false);
+            $comparedSerieName = $comparedEvent->getTitle();
+        }
+
+        $stats = $legacyInscriptions->obtenirSuivi($event->getId(), $comparedEventId);
         $ticketsDayOne = $this->ticketRepository->getPublicSoldTicketsByDay(Ticket::DAY_ONE, $event);
         $ticketsDayTwo = $this->ticketRepository->getPublicSoldTicketsByDay(Ticket::DAY_TWO, $event);
 
@@ -93,7 +100,7 @@ public function __invoke(Request $request)
                     }, $stats['suivi'])),
                 ],
                 [
-                    'name' => 'n-1',
+                    'name' => $comparedSerieName,
                     'data' => array_values(array_map(static function ($item) {
                         return $item['n_1'];
                     }, $stats['suivi'])),