Because the price of futures fluctuates constantly, the margin is generally raised on the day before the festival, because it is impossible to trade during the festival, and many futures varieties are also connected with the external market. In order to reduce the impact of drastic fluctuations in the external market on investors after the opening of the market, the margin is generally raised before the holiday and adjusted according to the situation after the holiday.

In futures trading, any trader must pay a small amount of funds according to a certain proportion of the value of the futures contracts he buys and sells (usually 5%- 15%) as the financial guarantee for his performance of futures contracts, and then he can participate in futures contract trading and decide whether to add funds according to price changes. When the futures price rises, the margin will be added, which will cause the margin to change.