My personal stop-loss strategy depends on risk management,support-resistance areas and ATR if we are talking about futures my personal risk per trade is not greater than 1 percent of my total balance than I can calculate ATR to understand what is the average price movements than understand where the support and resistant areas for example I can simply put my stop-loss lower the support level or take profit higher the resistance level. Considering ATR wil help to understand if your stop loss could be knocked out or not. Of course it is for swing, day or scalping but not for investing.