diff --git a/api/api_v1/endpoints/query.py b/api/api_v1/endpoints/query.py
index a70a3dc..0f40941 100644
--- a/api/api_v1/endpoints/query.py
+++ b/api/api_v1/endpoints/query.py
@@ -145,7 +145,8 @@ async def event_model(
         df = await ckdb.query_dataframe(sql)
         df.fillna(0, inplace=True)
         if df.shape[0] == 0:
-            continue
+            df = pd.DataFrame({'date':date_range,'values':0*len(date_range)})
+            # continue
             # return schemas.Msg(code=0, msg='ok', data=[q])
         if item['time_particle'] == 'total':
             # for group, df_group in df.groupby(groupby):
@@ -198,7 +199,7 @@ async def event_model(
             if len(df) >= 2:
                 q['chain_ratio'] = division((df.iloc[-1, 1] - df.iloc[-2, 1]) * 100, df.iloc[-2, 1], 2)
             if len(df) >= 8:
-                q['wow'] = division((df.iloc[-1, 1] - df.iloc[-8, 1]) * 100 / df.iloc[-8, 1], 2) or 0
+                q['wow'] = division((df.iloc[-1, 1] - df.iloc[-8, 1]) * 100, df.iloc[-8, 1], 2) or 0
             q['values'].append(df['values'].to_list())
             for last_value in df['values'].values[::-1]:
                 if last_value > 0: