It can be seen that in the variety information of futures, Master Boyi presses F 10, and after the continuous daily limit, the price will fluctuate, which also gives investors a rational understanding. If the falling board is easy to hit the board again, the margin will be increased the next day, which is even more unfavorable to the customer's transaction. If the board goes up and down for three days in a row, more people will die. After the expansion, people who set up three boards before can be eliminated, otherwise there will be a buffer.