The transaction is delayed for more than 3 seconds, resulting in serious slippage

Every time I enter the market, there is a slipage of 0.2~0.3 between the click transaction and the final transaction price, such as shorting 2010.9, clicking short, and the delay after clicking will cause the transaction price to become 2010.6. If it is a stop loss, you can stop the loss to the highest point or the lowest point every time. It's not due to network delay. For the same market, accounts opened on other platforms can be entered normally. It is difficult to make a profit when trading one lot in this way, with the spread plus slippage.