Serious slippage for POIPEX

The first picture is the international trend chart of usousd, and the second picture is POIPEX's own trend chart. It is the slippage of the third picture that seriously caused the liquidation of the position, and also generated negative numbers. The customer service said that they are secondary markets, not If you follow the international trend, you will have your own trend. The problem of negative numbers is pushed to the mt4 app, which has nothing to do with them. In order to verify this, I tried to use another foreign exchange broker to do intentional liquidation, but it will not generate negative numbers. ~POIPEX is a very problematic broker~ The fourth photo is the result of their liquidation, and the fifth is another foreign exchange broker, so I have two doubts: 1. Serious slippage problem 2. Negative numbers cause problems These two The problem is also related. If the slippage is not serious, and the international trend is not followed, the position will not be liquidated at all, and there should be no negative numbers~