High-accuracy small-winner systems and low-accuracy trend systems both work. Choosing between them is about temperament.
Key takeaways
- Expectancy, not win rate, determines profitability.
- High win-rate systems produce rarer but larger losses.
- Pick the profile you can psychologically sustain through a drawdown.
A system winning 70% of the time with a 1:0.7 payoff and a system winning 35% with a 1:3 payoff can have identical expectancy. The mathematics is indifferent; the trader is not.
High win-rate systems feel good day to day and produce occasional losses that erase many wins. The psychological risk is complacency followed by a shock.
Low win-rate trend systems lose most of the time and make their year in a few trades. The psychological risk is abandonment — quitting during the long flat period that precedes the payoff.
Neither is superior. Choose based on which failure mode you can survive: many small defeats, or occasional large ones. Then size so that your worst historical sequence is uncomfortable rather than fatal.
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