Backtest the exit first

Most people spend ninety percent of their research on entries and then bolt on a stop and target at the end. Try it the other way once. Take a deliberately dumb entry, random, or "buy every morning at the same time" — and spend your effort on the exit rules. You'll usually find the exit is doing far more of the work than you assumed, and you'll learn what your idea actually needs to survive. It also tells you something uncomfortable: if a random entry with your exits is roughly break-even, then your entry needs to beat that bar, and most don't.