diff --git a/prac.py b/prac.py
index 6101624..f35e029 100644
--- a/prac.py
+++ b/prac.py
@@ -11,7 +11,7 @@ team_name = "HanyangFloorFunction"
 # ==================== 설정 ====================
 ORDER_SIZE = 2
 MAX_POS = 20
-ARB_THRESHOLD = 40   # 🔥 보수적으로 (중요)
+ARB_THRESHOLD = 40   
 
 # ====================
 class Dir(str, Enum):
@@ -47,7 +47,7 @@ def main():
         if bid is None or ask is None:
             return
 
-        if ask - bid <= 2:  # 🔥 스프레드 너무 좁으면 패스
+        if ask - bid <= 2: 
             return
 
         pos = positions.get(sym, 0)
@@ -113,16 +113,13 @@ def main():
 
         pos = positions.get("XLF", 0)
 
-        # 🔥 포지션 제한
         if abs(pos) > 10:
             return
 
-        # 🔥 케이스 1
         profit1 = xlf_bid * 10 - basket_ask
         if profit1 > ARB_THRESHOLD:
             exchange.send_add_message_ioc(next_id(), "XLF", Dir.SELL, xlf_bid, 10)
 
-        # 🔥 케이스 2
         profit2 = basket_bid - xlf_ask * 10
         if profit2 > ARB_THRESHOLD:
             exchange.send_add_message_ioc(next_id(), "XLF", Dir.BUY, xlf_ask, 10)
@@ -159,7 +156,6 @@ def main():
 
             state.update_bid_ask_price(sym, bid, ask)
 
-            # 🔥 모든 주문 취소 (핵심)
             for oid in list(active_orders.keys()):
                 exchange.send_cancel_message(oid)
                 del active_orders[oid]
@@ -212,11 +208,20 @@ class ExchangeConnection:
 # ====================
 def parse_arguments():
     parser = argparse.ArgumentParser()
-    parser.add_argument("--test", default="prod-like")
+
+    group = parser.add_mutually_exclusive_group(required=True)
+    group.add_argument("--production", action="store_true")
+    group.add_argument("--test", type=str, default="prod-like")
+
     args = parser.parse_args()
 
-    args.exchange_hostname = "test-exch-" + team_name
-    args.port = 22000
+    if args.production:
+        args.exchange_hostname = "production"
+        args.port = 25000
+    else:
+        args.exchange_hostname = "test-exch-" + team_name
+        args.port = 22000
+
     return args
 
 if __name__ == "__main__":