Calmar Ratio
Measures return relative to maximum drawdown — how much you earn per unit of worst-case pain.
Formula
More Details
What is the Calmar Ratio?
The Calmar Ratio (originally named by Terry Young after his California Managed Accounts Reports newsletter) measures total return relative to the worst peak-to-trough drawdown you experienced.
While Sharpe and Sortino look at daily volatility, the Calmar Ratio asks a different question: "How much did I make compared to the worst period I had to survive?"
This makes it especially relevant for traders who care about capital preservation and psychological resilience. After all, a 50% drawdown requires a 100% gain just to get back to breakeven.
Formula
Calmar Ratio = Total Net P&L / |Maximum Drawdown|
Where:
- Total Net P&L = your cumulative realized profit/loss
- |Max Drawdown| = the absolute value of the largest peak-to-trough decline in your equity curve
Interpretation
| Calmar Ratio | Meaning |
|---|---|
| < 0 | Net negative — losing money overall |
| 0 – 1.0 | Your worst drawdown was larger than your total profit |
| 1.0 – 2.0 | Decent — profits exceed the worst drawdown |
| 2.0 – 5.0 | Strong — profits are multiples of the worst drawdown |
| > 5.0 | Excellent — either very profitable or very low drawdown |
Why the Calmar Ratio Matters for Real Traders
Suppose two traders both made $20,000 over the past year:
| Trader A | Trader B | |
|---|---|---|
| Total P&L | $20,000 | $20,000 |
| Max Drawdown | -$15,000 | -$4,000 |
| Calmar Ratio | 1.33 | 5.0 |
Both are profitable, but Trader B's journey was far smoother. If you're trading size, managing other people's money, or just want to sleep at night, the Calmar Ratio tells you how painful the path to profit was.
Understanding Max Drawdown
Maximum drawdown is the largest percentage or dollar decline from a peak to a subsequent trough in your equity curve before a new peak is made. It represents the worst-case scenario you actually experienced.
If your equity curve went: $10,000 → $15,000 → $11,000 → $18,000
- Peak: $15,000
- Trough: $11,000
- Max Drawdown: −$4,000 (or −26.7%)
Limitations
- Single-point risk: The Calmar Ratio depends on a single event (the max drawdown). If that was an unusual one-off, the ratio may overstate risk.
- No frequency information: It doesn't tell you how often large drawdowns occur, only the worst one.
- Time-dependent: A longer track record is likely to have a larger max drawdown, which pulls the Calmar down even if the strategy is getting better.
How TradesViz Calculates It
TradesViz computes the cumulative daily P&L equity curve from your realized trades, identifies the maximum drawdown, and divides total net P&L by that value. The max drawdown and its date are also displayed separately.
How TradesViz Does It Better
- Max Drawdown date shown alongside the Calmar so you know exactly when it happened
- Filter-aware: Compute Calmar for specific setups, tags, or date ranges
- Paired with Sharpe and Sortino for a three-dimensional risk view: volatility risk, downside risk, and drawdown risk
- Custom dashboard widget for portfolio-level monitoring
Where to find it in TradesViz
Example
A trader with $20,000 total profit and a $4,000 max drawdown has a Calmar Ratio of 5.0.