diff --git a/Bithumb_minute.py b/Bithumb_minute.py
index 21daacf..92e4272 100644
--- a/Bithumb_minute.py
+++ b/Bithumb_minute.py
@@ -537,8 +537,8 @@ class Bithumb_minute(HTS):
 
         return log_df
 
-    def check_buy_history(self, log_df, log_filename, hours=3):
-        now = datetime.now() - timedelta(hours=hours)
+    def check_buy_history(self, log_df, log_filename, min=10):
+        now = datetime.now() - timedelta(minutes=min)
 
         log_df = log_df.loc[(now < log_df.index)]
         if len(log_df) == 0:
@@ -620,7 +620,8 @@ class Bithumb_minute(HTS):
 
             # 10분이 지난 미체결은 취소한다.
             order_log_df = self.cancel_order(order_log_df, order_log_filename, min=10)
-            buy_history, buy_history_df = self.check_buy_history(buy_history_df, buy_history_filename, hours=3)
+            # 한번 매수 후 n분 이후 매수하기 위함
+            buy_history, buy_history_df = self.check_buy_history(buy_history_df, buy_history_filename, min=10)
             if isRealTime and not buy_history:
                 if max(bsLine['buy'][len(bsLine['buy']) - 2:]) > 100:
                     tmp = self.bithumb.get_balance(ticker)
@@ -643,7 +644,7 @@ class Bithumb_minute(HTS):
                     order_log_df['datetime'] = order_log_df.index
                     order_log_df.to_csv(order_log_filename, index=False)
 
-                    # 한번 매수 후 n시간 이후 매수하기 위함
+                    # 한번 매수 후 n분 이후 매수하기 위함
                     indexes2 = buy_history_df.index.tolist()
                     indexes2.append(datetime_value)