diff --git a/main.py b/main.py
index a4badad..6b8dd93 100644
--- a/main.py
+++ b/main.py
@@ -642,7 +642,7 @@ class GridTradingBot:
                     new_buy_price,
                 )
 
-                if quote_balance > self.reserve_quote:
+                if quote_balance - self.order_amount * new_buy_price > self.reserve_quote:
                     logger.debug(
                         "[GridTradingBot.extend_grid] Quote balance sufficient (%f > %f), checking order value",
                         quote_balance,