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Can You Be Profitable With a 40% Win Rate?

Yes. Win rate alone does not determine whether a trading system has positive expectancy. Suppose a strategy wins 40% of its trades, loses 60%, makes 2R on an average winner, and loses 1R on an average loser. (0.40 × 2R) − (0.60 × 1R) = +0.20R The system is profitable in expectation despite losing more trades than it wins. The opposite is also possible: a strategy can win very frequently and still lose money if occasional losses are much larger than typical gains. The meaningful variables are win probability, average payoff, average loss, trading costs, and execution—not win rate in isolation.