diff --git a/main.py b/main.py
index ba19697..2c105b9 100644
--- a/main.py
+++ b/main.py
@@ -191,9 +191,9 @@ class GridTradingBot:
         )
 
         if side == "BUY":
-            price = base_price * (1 - self.grid_percentage) ** level
+            price = base_price / (1 + self.grid_percentage) ** level
             logger.custom_debug(
-                "[GridTradingBot.calculate_grid_price] Calculated BUY price: %f * (1 - %f)^%d = %f",
+                "[GridTradingBot.calculate_grid_price] Calculated BUY price: %f / (1 + %f)^%d = %f",
                 base_price,
                 self.grid_percentage,
                 level,