Because futures have a delivery date, you must close your position on the delivery date, otherwise the system will automatically close your position.

The second is overnight risk. Most futures can be overnight, but the risk of overnight is too great. When we invest, we should look at the risk first and then at the income, because sometimes it will open higher or lower. The position is too heavy, the direction is wrong, the loss is too big, and there is a risk of being liquidated.

Hope to adopt, if you have other investment problems, you can continue to consult.