There's no way without canceling the trade if you already made a profit by holding BTC or losing a profit then the only way to get out of the trade is to exchange it to FIAT or USDT.

Are you still selling orders for BTC higher than the current price since you said it is still open I don't get what your point but if you already made a profit with BTC cancel the order and trade it right away with the current price to exit?