diff --git a/stock/analysis/AnalyzerSqlite.py b/stock/analysis/AnalyzerSqlite.py
index c167751..3df7a56 100644
--- a/stock/analysis/AnalyzerSqlite.py
+++ b/stock/analysis/AnalyzerSqlite.py
@@ -592,9 +592,13 @@ class AnalyzerSqlite:
                                 self.writeFile(type, CODE, NAME, top, stock_daily, status)
 
                     # daily_낙폭과대 (50% 이상 하락)
-                    c_index = 520
+                    c_index = 52*5
                     if len(stock_daily['close']) < c_index:
                         c_index = len(stock_daily['close'])
+                    for idx in range(1,c_index):
+                        if stock_daily['close'][idx-1] < int(stock_daily['close'][idx]/3):
+                            c_index = idx
+
                     location = (max(stock_daily['close'][1:c_index]) - stock_daily['close'][0]) / max(stock_daily['close'][1:c_index])
                     if location > 0.5:
                         type = "daily_낙폭과대"