The average player thinks that money is deducted for no reason, but it may actually be because:

1. Before your short position, the balance is not enough to deduct the loss, especially when the market fluctuates greatly, and your account is still negative, generally the highest is about $20, and then when you reinvest, you will deduct the money you owed last time.

There is an overnight fee for this transaction. For example, a platform will charge a very small percentage of overnight fees for opening positions every Wednesday morning, but if you say that you are short of $20 at a time, unless you have dozens of opening positions.