diff --git a/scripts/common/charthelper.py b/scripts/common/charthelper.py
new file mode 100644
index 0000000..e5aad4a
--- /dev/null
+++ b/scripts/common/charthelper.py
@@ -0,0 +1,46 @@
+import random
+
+def getColor():
+    r = random.randrange(255)
+    g = random.randrange(255)
+    b = random.randrange(255)
+    return 'rgb({:0},{:0},{:0})'.format(r,g,b)
+
+def createElement(label, color, data) :
+  return {
+    "label": label,
+    "backgroundColor": color,
+    "data": data
+  }
+
+def setTsunamyInfo(tsunamy, messagesDataTsunamy, id, length):
+  if tsunamy & Tsunami.GLOBAL:
+    messagesDataTsunamy[Tsunami.GLOBAL][id] += length
+  if tsunamy & Tsunami.PROJECT:
+    messagesDataTsunamy[Tsunami.PROJECT][id] += length
+  if tsunamy & Tsunami.DEMOCRACY:
+    messagesDataTsunamy[Tsunami.DEMOCRACY][id] += length
+  if tsunamy & Tsunami.ECOLOGY:
+    messagesDataTsunamy[Tsunami.ECOLOGY][id] += length
+  if tsunamy & Tsunami.TECHNOLOGY:
+    messagesDataTsunamy[Tsunami.TECHNOLOGY][id] += length
+
+def getTsunamy(channel):
+    value = Tsunami.GLOBAL
+    if 'description' in channel:
+        if channel['description'].find("#projet") != -1:
+            value |= Tsunami.PROJECT
+        if channel['description'].find("#democratie") != -1:
+            value |= Tsunami.DEMOCRACY
+        if channel['description'].find("#ecologie") != -1:
+            value |= Tsunami.ECOLOGY
+        if channel['description'].find("#technologie") != -1:
+            value |= Tsunami.TECHNOLOGY
+    return value
+
+class Tsunami:
+    GLOBAL      = 1 << 0
+    PROJECT     = 1 << 1
+    DEMOCRACY   = 1 << 2
+    ECOLOGY     = 1 << 3
+    TECHNOLOGY  = 1 << 4
\ No newline at end of file
diff --git a/scripts/common/rocketchathelper.py b/scripts/common/rocketchathelper.py
index e4b8927..b8d84fa 100644
--- a/scripts/common/rocketchathelper.py
+++ b/scripts/common/rocketchathelper.py
@@ -25,26 +25,6 @@ def getNodesOrigin(channel):
 
   return nodes
 
-def getTsunamy(channel):
-    value = Tsunami.GLOBAL
-    if 'description' in channel:
-        if channel['description'].find("#projet") != -1:
-            value |= Tsunami.PROJECT
-        if channel['description'].find("#democratie") != -1:
-            value |= Tsunami.DEMOCRACY
-        if channel['description'].find("#ecologie") != -1:
-            value |= Tsunami.ECOLOGY
-        if channel['description'].find("#technologie") != -1:
-            value |= Tsunami.TECHNOLOGY
-    return value
-
-class Tsunami:
-    GLOBAL      = 1 << 0
-    PROJECT     = 1 << 1
-    DEMOCRACY   = 1 << 2
-    ECOLOGY     = 1 << 3
-    TECHNOLOGY  = 1 << 4
-
 def getAllChannels(rocket):
   index = 0
   allChannels = []
diff --git a/scripts/generate_chat_stat_monthly.py b/scripts/generate_chat_stat_monthly.py
index b5412ca..8c6f86c 100644
--- a/scripts/generate_chat_stat_monthly.py
+++ b/scripts/generate_chat_stat_monthly.py
@@ -10,33 +10,9 @@ import os
 import random
 from datetime import datetime
 from monthdelta import monthdelta
-from common.rocketchathelper import getTsunamy, Tsunami, getAllChannels, getAllMessages, Connection
+from common.rocketchathelper import getAllChannels, getAllMessages, Connection
 from common.savehelper import save
-
-def getColor():
-    r = random.randrange(255)
-    g = random.randrange(255)
-    b = random.randrange(255)
-    return 'rgb({:0},{:0},{:0})'.format(r,g,b)
-
-def createElement(label, color, data) :
-  return {
-    "label": label,
-    "backgroundColor": color,
-    "data": data
-  }
-
-def setTsunamyInfo(tsunamy, messagesDataTsunamy, id, length):
-  if tsunamy & Tsunami.GLOBAL:
-    messagesDataTsunamy[Tsunami.GLOBAL][id] += length
-  if tsunamy & Tsunami.PROJECT:
-    messagesDataTsunamy[Tsunami.PROJECT][id] += length
-  if tsunamy & Tsunami.DEMOCRACY:
-    messagesDataTsunamy[Tsunami.DEMOCRACY][id] += length
-  if tsunamy & Tsunami.ECOLOGY:
-    messagesDataTsunamy[Tsunami.ECOLOGY][id] += length
-  if tsunamy & Tsunami.TECHNOLOGY:
-    messagesDataTsunamy[Tsunami.TECHNOLOGY][id] += length
+from common.charthelper import createElement, getColor, setTsunamyInfo, Tsunami, getTsunamy
 
 def main():
   rocket = Connection()