For example, the final closing price of PTA is 8722 and the settlement price is 8900. The difference between the closing price and the settlement price is 178 points. If you chase the short position in the end, you must open it lower by 178 the next day to break even. If it is flat or slightly higher, it will be a big loss, but it is not recommended to use the difference between the settlement price and the settlement price to make a bill. For example, we should place more orders at the end. You can earn 178 points by opening the second balance. As you know, futures prices are affected by many factors, and there are many uncertain factors. It is not recommended to chase up. Of course there are exceptions. For example, in wave theory, it is possible to chase the market with three waves. I hope I can help you.