A short position means that after the margin is removed, the loss is greater than the available funds in the account. For example, you have 5,000 yuan in your account, trading primary methanol, 3,000 yuan in margin and 2,000 yuan in available funds, but your account has lost money, with a loss of more than 2,000 yuan. This is a short position.

In this case, the futures company with strict control will call you in time and ask you to increase funds or reduce positions in time. If you don't increase funds or lighten up positions in time, the futures company will be strong.