diff --git a/app/enum/action_type.py b/app/enum/action_type.py
index 2fbec69..667e3de 100644
--- a/app/enum/action_type.py
+++ b/app/enum/action_type.py
@@ -1,7 +1,9 @@
 from enum import Enum
 
+
 class ActionType(Enum):
-  CLICK = 1
-  LIKE = 2
-  WATCH = 3
-  RATING = 4
\ No newline at end of file
+    CLICK = 1
+    LIKE = 2
+    WATCH = 3
+    RATING = 4
+    DISLIKE = 5
diff --git a/app/services/weight_strategy.py b/app/services/weight_strategy.py
index 5a6474e..b7753b3 100644
--- a/app/services/weight_strategy.py
+++ b/app/services/weight_strategy.py
@@ -1,25 +1,28 @@
 from app.enum.action_type import ActionType
 
-def convert_to_weight(type : ActionType, value : float) -> float :
-  if type == ActionType.CLICK:
-    return 0.05
-  if type == ActionType.LIKE:
-    return 0.1
-  if type == ActionType.WATCH:
-    if 30 <= value <= 50:
-      return 0.1
-    if 50 <= value <= 70:
-      return 0.2
-    if 70 <= value:
-      return 0.3
-    else:
-      return 0
-  if type == ActionType.RATING:
-    if value <= 2:
-      return 0
-    if value == 3:
-      return 0.2
-    if value == 4:
-      return 0.3
-    if value == 5:
-      return 0.4
+
+def convert_to_weight(type: ActionType, value: float) -> float:
+    if type == ActionType.CLICK:
+        return 0.05
+    if type == ActionType.LIKE:
+        return 0.1
+    if type == ActionType.WATCH:
+        if 30 <= value <= 50:
+            return 0.1
+        if 50 <= value <= 70:
+            return 0.2
+        if 70 <= value:
+            return 0.3
+        else:
+            return 0
+    if type == ActionType.RATING:
+        if value <= 2:
+            return 0
+        if value == 3:
+            return 0.2
+        if value == 4:
+            return 0.3
+        if value == 5:
+            return 0.4
+    if type == ActionType.DISLIKE:
+        return -0.1