What Is the Calmar Ratio? Return Versus Worst-Case Pain
The Calmar ratio divides your return by your worst drawdown. It answers whether the reward a system delivered was worth the deepest hole it dug along the way.
The Calmar ratio weighs what you earned against the worst pain you took to earn it. It divides your return by your maximum drawdown — the single deepest peak-to-trough fall in your record.
Calmar = return ÷ maximum drawdown
Why it matters
Sharpe and Sortino judge the bumpiness of the whole ride. Calmar zooms in on the one moment that ends accounts and breaks nerves: the worst stretch. A system can have a tidy Sharpe yet a brutal max drawdown — Calmar is the ratio that refuses to let that slide.
A worked example
| System | Return | Max drawdown | Calmar |
|---|---|---|---|
| A | +30R | −10R | 3.0 |
| B | +30R | −25R | 1.2 |
Both made +30R, but System B put you through more than twice the worst-case pain to get there. System A is the more durable engine.
How to use it
- Higher is better — more reward for each unit of worst-case loss.
- Favour survivability — a strong Calmar means the system is unlikely to dig a hole deep enough to force you to quit.
- Pair it with duration — a shallow drawdown that lasts a year still tests patience; read Calmar alongside how long your drawdowns last.
Educational content only. Tracktions is a trade-journaling and analytics tool, not investment advice — we are not SEBI-registered advisers and do not provide trade recommendations, tips, or assurances of returns.