I don’t think you can as the market is closed - I’ve researched this and if “slippage” occurs and you have a “normal stop loss” which happens to be lower than opening price then you get executed at opening price, (which I guess is 11pm tonight)
apparently you need to select “guaranteed stop loss” to allow yourself to guarantee a stop at your chosen price.
fingers crossed. I’m in too deep really, it’s been an awful weekend worrying!!🤦🏼