diff --git a/coins_buy_time.json b/coins_buy_time.json
index 14b8604..bcf6b66 100644
--- a/coins_buy_time.json
+++ b/coins_buy_time.json
@@ -1,5 +1,5 @@
 {
-  "BONK": "2025-08-07T07:44:02.345835",
-  "APE": "2025-08-09T14:22:02.089619",
-  "PEPE": "2025-08-09T14:52:08.398420"
+  "BONK": {"datetime": "2025-08-07T07:44:02.345835", "buy_signal": "movingaverage"},
+  "APE": {"datetime": "2025-08-09T14:22:02.089619", "buy_signal": "movingaverage"},
+  "PEPE": {"datetime": "2025-08-09T14:52:08.398420", "buy_signal": "movingaverage"}
 }
\ No newline at end of file
diff --git a/monitor.py b/monitor.py
index 5bc5879..ec1e8d2 100644
--- a/monitor.py
+++ b/monitor.py
@@ -19,10 +19,13 @@ import os
 class Monitor:
     """자산(코인/주식/ETF) 모니터링 및 매수 실행 클래스"""
 
+    last_buy_signal = None
     cooldown_file = None
 
     def __init__(self, cooldown_file='coins_buy_time.json') -> None:
         self.hts = HTS()
+        # 최근 매수 신호 저장용(파일은 [신규] 포맷으로 저장)
+        self.last_buy_signal: dict[str, str] = {}
         if cooldown_file is not None:
             self.cooldown_file = cooldown_file
             self.buy_cooldown = self._load_buy_cooldown()
@@ -34,8 +37,25 @@ class Monitor:
                 with open(self.cooldown_file, 'r', encoding='utf-8') as f:
                     data = json.load(f)
                     cooldown: dict[str, datetime] = {}
-                    for symbol, time_str in data.items():
-                        cooldown[symbol] = datetime.fromisoformat(time_str)
+                    # [기존] 문자열 값, [신규] 객체 값 모두 지원
+                    for symbol, value in data.items():
+                        if isinstance(value, str):
+                            # [기존] 포맷: "SYMBOL": "2025-08-07T07:44:02.345835"
+                            try:
+                                cooldown[symbol] = datetime.fromisoformat(value)
+                            except Exception:
+                                continue
+                        elif isinstance(value, dict):
+                            # [신규] 포맷: "SYMBOL": {"datetime": "...", "buy_signal": "..."}
+                            dt_str = value.get('datetime')
+                            if isinstance(dt_str, str):
+                                try:
+                                    cooldown[symbol] = datetime.fromisoformat(dt_str)
+                                except Exception:
+                                    pass
+                            buy_signal = value.get('buy_signal', '')
+                            if isinstance(buy_signal, str):
+                                self.last_buy_signal[symbol] = buy_signal
                     return cooldown
             except Exception as e:
                 print(f"Error loading cooldown data: {e}")
@@ -44,9 +64,13 @@ class Monitor:
 
     def _save_buy_cooldown(self) -> None:
         try:
-            data: dict[str, str] = {}
+            # [신규] 포맷으로 저장
+            data: dict[str, dict] = {}
             for symbol, dt in self.buy_cooldown.items():
-                data[symbol] = dt.isoformat()
+                data[symbol] = {
+                    'datetime': dt.isoformat(),
+                    'buy_signal': self.last_buy_signal.get(symbol, '')
+                }
             with open(self.cooldown_file, 'w', encoding='utf-8') as f:
                 json.dump(data, f, ensure_ascii=False, indent=2)
         except Exception as e:
@@ -135,11 +159,12 @@ class Monitor:
                 else:
                     buy_amount = 300000
 
-                if symbol in self.buy_cooldown:
-                    time_diff = current_time - self.buy_cooldown[symbol]
-                    if time_diff.total_seconds() < 600:
-                        print(f"{symbol}: 매수 금지 중 (남은 시간: {600 - time_diff.total_seconds():.0f}초)")
-                        return False
+                if symbol in self.buy_cooldown and symbol in self.last_buy_signal:
+                    if self.last_buy_signal[symbol] == 'fall_6p':
+                        time_diff = current_time - self.buy_cooldown[symbol]
+                        if time_diff.total_seconds() < 4000:
+                            print(f"{symbol}: 매수 금지 중 (남은 시간: {600 - time_diff.total_seconds():.0f}초)")
+                            return False
             else:
                 if symbol in self.buy_cooldown:
                     time_diff = current_time - self.buy_cooldown[symbol]
@@ -163,6 +188,11 @@ class Monitor:
             _ = self.hts.buyCoinMarket(symbol, buy_amount)
 
             if self.cooldown_file is not None:
+                # 최근 매수 신호를 함께 기록하여 [신규] 포맷으로 저장
+                try:
+                    self.last_buy_signal[symbol] = str(data['buy_signal'].iloc[-1])
+                except Exception:
+                    self.last_buy_signal[symbol] = ''
                 self.buy_cooldown[symbol] = current_time
                 self._save_buy_cooldown()
 
@@ -249,8 +279,10 @@ class Monitor:
                 try:
                     prev_low = data['Low'].iloc[i - 1]
                     curr_close = data['Close'].iloc[i]
+                    curr_low = data['Low'].iloc[i]
                     cond_close_drop = curr_close <= prev_low * 0.94
-                    if cond_close_drop:
+                    cond_low_drop = curr_low <= prev_low * 0.94
+                    if cond_close_drop or cond_low_drop:
                         data.at[data.index[i], 'buy_signal'] = 'fall_6p'
                         data.at[data.index[i], 'buy_point'] = 1
                         if not simulation and data['buy_point'][-3:].sum() > 0: