diff --git a/main.py b/main.py
index 34870f6..a3dcde9 100644
--- a/main.py
+++ b/main.py
@@ -70,6 +70,9 @@ async def main():
 
         up_bid_price = market_data["best_bid_price"]
         up_ask_price = market_data["best_ask_price"]
+        
+        if not (0.1 < up_ask_price < 0.9):
+            continue
 
         down_ask_price = 1 - up_bid_price
         down_bid_price = 1 - up_ask_price