Risk of ruin Calculator
Estimate the probability of losing a defined fraction of your account given win rate, win/loss ratio and risk-per-trade.
Uses a standard risk-of-ruin approximation for a positive-edge strategy with fixed-fractional sizing. Treat the result as a guide, not a guarantee.
Result
- Per-trade expectancy
- 0.375
- Probability of ruin
- 0.00%
Above 0 means a positive long-run edge.
Approximate. Halve any claimed edge to stress-test.
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Educational only — not financial advice. Always verify calculations against your broker’s own tools and contract specifications.