You’d want a stop loss buy when you’re shorting the market. If you’re not familiar with the term, “shorting” is when you borrow an asset from someone else, sell it immediately, and the buy it back at a later date (hopefully when the price has gone down). So you make the difference between the price you sold it at and the price you bought it back at, minus a fee for borrowing the asset. You’d want a stop loss buy here because when the price goes up, you lose money, and will be forced to buy back the asset at a higher price.

Does that make sense?