What is the Calmar ratio and why does it matter?

The Calmar ratio is annual return divided by maximum drawdown. A system returning 100% per year with 50% max drawdown has a Calmar of 2.0. The same 100% return with 12% max drawdown produces a Calmar of 8.3. Higher is better. The Calmar ratio normalises return figures so you can compare systems on a risk-adjusted basis rather than raw return. A Calmar above 3.0 is considered excellent; below 1.0 indicates the return does not justify the drawdown risk.

Why do martingale-style EAs produce high returns followed by crashes?

Martingale logic doubles position size after each loss, so any winning trade recovers all previous losses in one hit. During calm, trending markets, this produces spectacular-looking returns — every inevitable winning trade compounds the gains from previous doubled positions. The problem is that martingale has no mathematical ceiling on how much can be lost before that winning trade arrives. A sequence of 6–8 consecutive losses, each with a doubled position, can exceed the entire account balance. The crash is not a bug; it is the inevitable end state of uncapped position doubling.

How do EA marketers hide the drawdown in their results?

Common tactics include: showing only the equity curve (which smooths the peak-to-trough shape), quoting "average monthly drawdown" instead of "maximum historical drawdown", cherry-picking the start date of the results to a period just after the last major drawdown, using optimised backtest periods (curve-fitting) where the strategy performed unrealistically well, and presenting the percentage return without the corresponding drawdown figure anywhere on the page. Always ask specifically for: maximum drawdown %, drawdown duration, and the ratio of annual return to max drawdown.

What does a 50% drawdown actually require to recover?

A 50% drawdown requires a 100% gain to recover. If your account drops from $10,000 to $5,000 (50% drawdown), you need to double the remaining $5,000 — a 100% return on the post-drawdown balance — just to get back to where you started. During that recovery period, you are also paying the psychological cost of watching the account grind back. Many traders cannot hold through this and liquidate at or near the bottom, crystallising the loss permanently.

Is there a good return-to-drawdown ratio to target in a gold EA?

As a starting reference point: annual return of 15–30% with a max drawdown under 15% represents solid risk-adjusted performance for a XAUUSD EA. That produces a Calmar of 1.0–2.0, which is respectable for a retail system. The goal is not to maximise absolute return — it is to maximise return per unit of drawdown risk. A system returning 25% with 8% max drawdown is far superior to one returning 100% with 50% max drawdown, despite the smaller headline number.

The Hidden Cost Reveal

Both accounts below started at $10,000 and ended at $20,000 — a 100% return. Which one would you have chosen to trade?

Chart A

Steady growth — max drawdown 12%

Month 1Month 12

Calmar Ratio: 8.3

Chart B

Same 100% return — max drawdown 50%

Month 1Month 12

Calmar Ratio: 2.0

Both made 100%. The difference is the Calmar Ratio — and most EA marketers hide it.

Chart A returned 100% with 12% max drawdown (Calmar 8.3 = excellent). Chart B returned 100% with 50% max drawdown (Calmar 2.0 = poor). The trader in Chart B spent 6 months watching their account halve before it recovered. Many quit before the recovery.

Home / Questions / 100% Gains but 50% Drawdown Explained

Why Do Some Gold EAs Show 100% Gains but 50% Drawdowns?

Quick Answer

EAs showing massive returns alongside huge drawdowns typically use aggressive compounding, martingale-style position sizing, or lack any hard stop loss. The returns are real in the best case — but so is the 50% loss event that arrives sooner or later. The metric that separates genuinely good EA performance from reckless risk-taking is the Calmar ratio: annual return divided by max drawdown. A 100% return with 50% drawdown (Calmar 2.0) is far inferior to a 25% return with 8% drawdown (Calmar 3.1).

Calmar Ratio Calculator

Evaluate any EA's risk-adjusted performance with a single ratio.

Annual Return (%)

Max Drawdown (%)

Calmar Ratio

2.00

100% return ÷ 50% max drawdown

Verdict

Good

Good ratio — returns justify the drawdown for most risk tolerances.

Recovery maths: a 50% drawdown requires a 100% gain on remaining balance just to break even. That recovery must come before the strategy is considered successful.

How Martingale Strategies Generate False High Returns

Martingale logic works by doubling position size after each losing trade. When a winner finally arrives, it covers all previous losses in a single trade. In a back-test on smooth trending data, this creates a beautiful smooth equity curve with exceptional win rates (the EA "always" recovers) and impressive return figures.

The problem is asymmetric exposure. A 6-step martingale starting at 0.01 lots reaches 0.64 lots on step 6. If that final position also loses, the cumulative damage is approximately 1.27 lots equivalent — catastrophic on a standard account. And because the strategy is doubling each time, the margin requirement grows exponentially. Most brokers issue a margin call before the sequence can complete its recovery.

The spectacular returns you see in many gold EA marketing materials are almost always from martingale-style systems during the phase before the blow-up. The blow-up itself is either not shown (the account was restarted), or it is presented as a "technical issue" rather than a structural feature of the strategy.

What Good Risk-Adjusted Returns Actually Look Like

Annual Return	Max Drawdown	Calmar Ratio	Assessment
100%	50%	2.0	The trap — high return headline hides devastating drawdown
60%	30%	2.0	Same ratio — still requires recovering from a third of capital
30%	15%	2.0	Same ratio — but 15% max drawdown is manageable for most
25%	8%	3.1	Superior — excellent risk-adjusted return, low psychological cost
20%	6%	3.3	Conservative but excellent Calmar — this is institutional-grade discipline

How Defined Stop Losses Prevent the 50% Scenario

The common thread in high-drawdown gold EAs is the absence of a hard stop loss on individual trades. Without a stop loss, a single trade can be held open for days or weeks while the market moves against it, accumulating unrealised losses until either the market reverses or the account is wiped. Every catastrophic drawdown on a gold EA can be traced to this single factor.

Goldie Razor V2.8.4 uses a 6-level trailing stop ladder and a defined maximum loss per trade, meaning no single position can accumulate unlimited damage. The trailing stop mechanism also actively reduces the worst-case per-trade loss as trades move in favour: once a trade reaches Level 3 of the ladder, the effective maximum loss from that point is a fraction of the original stop distance.

This architectural discipline is exactly what prevents the "spectacular return, devastating crash" pattern. The price is lower absolute return potential — the trailing stop exits positions that might have continued further — but the tradeoff is a Calmar ratio that remains respectable because the drawdown side of the equation is controlled.

Why Do Some Gold EAs Show 100% Gains but 50% Drawdowns?

Calmar Ratio Calculator

How Martingale Strategies Generate False High Returns

What Good Risk-Adjusted Returns Actually Look Like

How Defined Stop Losses Prevent the 50% Scenario

Related Reading

Frequently Asked Questions