If you do margin trading, there is the possibility of short positions. If it is an ordinary transaction, there will be no short positions, and margin trading is short positions. Margin trading is a margin trading, and ordinary trading is not a margin trading.

A short position refers to an investor who loses money in the course of trading, but there is not enough money in the investor's account to make up for the loss. If the general account has no funds, and the margin is lost by half, it will be forced to close the position. The main reason for the short position is that the position is too heavy.