I think it works. It's a game of probabilities.
Statistics can help you to find your % of profitable signals, e.g. 30% ---> Your R:R at least must be = 3:1 (TP:SL). One must put strict rules under the percentage of successful trades.
Statistics can help you to find your % of profitable signals, e.g. 30% ---> Your R:R at least must be = 3:1 (TP:SL). One must put strict rules under the percentage of successful trades.