Technically, you have judged the general direction of the market, and the fundamentals are enough to support your point of view. However, the trend of funds after the game on that day was inconsistent with your judgment, which made it impossible for you to close your position smoothly. If you want to wait and see overnight, you must set a stop loss point. Of course, there are other conditions, such as not occupying too much margin, leaving some available funds to bear the losses, and bearing the risks caused by the large gap between the settlement price and the closing price. Short-term or overnight.