f* = (bp - q) / b
Where b = win/loss ratio, p = win probability, q = loss probability
Example:
If your system wins 60% of the time with 1:2 risk/reward:
f* = (2 × 0.6 - 0.4) / 2 = 0.4 (risk 40%)
Most traders use half-Kelly (20%) for safety.
Free Kelly Calculator: https://blog.quant-view.xyz/tools/?utm_source=devto
TG: https://t.me/GFIL_Trading
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