I agree, my exchange has stop loss and I wouldn't use one without it. Particularly because I margin trade and short which obviously incurs a greater risk. It allows me to add additional funds to a position that seems to be going off the rails if I feel the market will turn back around to my favor - but with a limit that I feel comfortable with. I like the option to use a variety of order types like protection and OCO as offered by primexbt. This is a good variety for me to maximize my profit potential at the same time as minimizing the risk of loss.  Also being able to trade on the go with an app to prevent getting stopped out early when using a stop loss is incredibly valuable if, again, the market looks like it will recover.