Hello dear Scooby, remember there's a more complicated computation of win/loss ratio than simply minding "XYZ % stop-win and ZYX % stop-loss".
You have to chart your system's fluctuations in such a way that you account for the highest point (peak) and the lowest point (drawdown) of every session.
You then do a gaussian-bell distribution of it.
Take the most-common peak of fluctuation and the most common drawdown.
Your win-goal is the most common high-point your sessions have before sinking, your stop-loss is determined by the lowest-possible drawdown your bankroll needs to be in order to pass enough sessions for making the method profitable.
This isn't determined by the person, but rather by the method's specific fluctuation ranges.
Hope it helps,
Victor