If you do more, you will earn if the settlement price is higher than the opening price, and lose if the settlement price is lower than the opening price;
If you are short, you will earn if the settlement price is lower than the opening price, and lose if it is higher than the opening price.
The money earned is transferred to your account as a floating win;
The money paid is deducted from your account, which is a floating loss.
If your margin is insufficient because of floating losses, the futures company will inform you to add margin. If the margin is not added in time, the futures company will forcibly close the positions with insufficient margin at an appropriate time.