diff --git a/hts/BuySellChecker.py b/hts/BuySellChecker.py
index 356c07f..7553906 100644
--- a/hts/BuySellChecker.py
+++ b/hts/BuySellChecker.py
@@ -200,14 +200,14 @@ class BuySellChecker:
         ##########################
         if i < 40:
             if data["slow_k"][i] <= 20:
-                if data["slow_k"][i - 1] < data["slow_d"][i - 1] and data["slow_d"][i] < data["slow_k"][i]:
+                if data["slow_k"][i - 2] < data["slow_d"][i - 2] and data["slow_k"][i - 1] < data["slow_d"][i - 1] and data["slow_d"][i] < data["slow_k"][i]:
                     if data["Close"][i] < data["avg5"][i]:
                         buy = data["Close"][i]
                     else:
                         buy = data["Low"][i]
         else:
             if data["slow_k"][i] <= 35:
-                if data["slow_k"][i-1] < data["slow_d"][i-1] and data["slow_d"][i] < data["slow_k"][i]:
+                if data["slow_k"][i-2] < data["slow_d"][i-2] and data["slow_k"][i-1] < data["slow_d"][i-1] and data["slow_d"][i] < data["slow_k"][i]:
                     if data["Close"][i] < data["avg5"][i]:
                         buy = data["Close"][i]
                     else:
@@ -229,7 +229,7 @@ class BuySellChecker:
         ### RSI buy 분석 ###
         ###################
         if data["rsi"][i] < 25:
-            if data["rsi"][i - 1] < data["rsis"][i - 1] and data["rsis"][i] < data["rsi"][i]:
+            if data["rsi"][i - 2] < data["rsis"][i - 2] and data["rsi"][i - 1] < data["rsis"][i - 1] and data["rsis"][i] < data["rsi"][i]:
                 if data["Close"][i] < data["avg5"][i]:
                     buy = data["Close"][i]
                 else: