After the stop loss and take profit of foreign exchange are set, the position will be closed automatically after the price reaches this point, and there is no need to close the position manually. What you said may be that the price has not stabilized after that point, so the system has not leveled off.

It is also possible that the platform you made has some slippage problems ~

You don't have to wait for a single transaction to close automatically. As long as you set a stop loss, you can start trading automatically! Instead of automatic liquidation!