diff --git a/user_data/strategies/freq_data_cleaner.py b/user_data/strategies/freq_data_cleaner.py
index 92d50b69e..c77643759 100644
--- a/user_data/strategies/freq_data_cleaner.py
+++ b/user_data/strategies/freq_data_cleaner.py
@@ -17,7 +17,7 @@ def clean_json():
         date = datetime.datetime.strptime(str(date), "%Y-%m-%d %H:%M:%S")
         year = date.year
         month = date.month
-        if year == int(Config.BACKTEST_DATA_CLEANER_YEAR) and month == int(Config.BACKTEST_DATA_CLEANER_MONTH_INDEX):
+        if year == int(Config.BACKTEST_DATA_CLEANER_YEAR) and month == int(Config.BACKTEST_DATA_CLEANER_MONTH_INDEX) + 1:
             list.append(datas)
     json_object = json.dumps(list)
     file.close()