9시 이후에 장을 못 볼거 같아서 원하는 가격까지 오르면 팔리게 하고 싶은데 이게 9시 이전에 주문 해도 주문이 가능한가요? 주문이 가능하면 똑같이 안팔렸을 경우 오후 3시전에만 취소하면 되는건가요?