You are right, when we use stop loss in our trading, so we must know the condition and make the analysis for our margin and trend condition, if you think the trend will be back soon so you can take stop loss is not too big ...
but some people say that the 100 pips SL could be 90% successful, I do not know it, because I rarely use stop loss
I recommend you to use trailing stop as well or lock in profits so when you are in positive condition. pips and abruptly the graph moves backwards against your order, so it will not lose some pips or you still earn some profit