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What Is a Drawdown in Trading?
Category: Risk managementChinese: 回撤
Short definition
A drawdown is the decline in account (or strategy) equity from its most recent peak to the subsequent trough, normally expressed as a percentage of that peak.
What it means
Drawdown measures distance from your own high-water mark, not from your deposit. If an account grows from 10,000 to 12,000 and then falls to 10,800, the drawdown is 10% (12,000 → 10,800) even though the account is still in profit. That framing matters: it makes drawdown the natural measure of the pain a strategy inflicts on the person running it, at the worst possible moment — right after things were going well.
The arithmetic of recovery is asymmetric and unforgiving. A 10% drawdown needs an 11.1% gain to break even; 20% needs 25%; 50% needs 100%. The deeper the hole, the more the required return balloons — which is why risk management concentrates on capping drawdown rather than maximizing upside per trade.
Drawdowns have two clocks. The depth (how far) is set by loss size per trade and how losers cluster; the duration (how long underwater) is set by how quickly the strategy's edge reasserts itself. A strategy can have modest depth but keep you underwater for months — which is the version of pain that usually breaks discipline first.
Reading drawdown honestly
Three numbers make a drawdown informative instead of just uncomfortable:
- Current drawdown vs your planned maximum: every written strategy should name a stop-the-strategy level (e.g., -15%); crossing it is information, not an occasion for hope.
- Contribution split: how much of the drawdown came from planned losing trades vs rule breaks (oversized or unplanned entries). Only the first belongs to the strategy.
- Recovery requirement: convert depth to the gain needed to break even (10% → 11.1%, 20% → 25%) before deciding to "trade bigger to get back".
- Time underwater relative to your review horizon: a swing account three weeks under water is normal; the same account nine months under water is a different strategy than the one you tested.
Capping drawdown before it caps you
Drawdown control is mostly position sizing plus tripwires decided in advance:
- 1.Size positions from a fixed risk-per-trade (a fraction of equity risked to the stop), so a losing streak produces a smooth, plannable equity decline instead of cliffs.
- 2.Set tiered tripwires: at -5%, halve risk per trade; at -10%, trade the smallest viable size and review every rule; at your stop-the-strategy level, stop.
- 3.Separate strategy drawdown from behavior drawdown in your journal — tag every losing trade planned or unplanned, and chart the two series apart.
- 4.Stress-test the depth in simulation before scaling size: run the same rules through a deliberately bad stretch and confirm the maximum drawdown is one you can sit through.
- 5.Rehearse the emotional half: practice taking the planned losses in a simulator until the equity curve dipping is boring rather than alarming.
Frequently asked questions
Is a drawdown the same as a loss?
No. A loss is the P&L of one closed trade; a drawdown is the distance of your equity from its prior peak, which can exist while the account is still up overall. You can be in drawdown on the year and still in profit versus your deposit — both statements are true at once.
What is a 'good' maximum drawdown?
There is no universal number; it depends on risk per trade, strategy frequency, and — decisively — your ability to keep executing the rules while underwater. The working rule is that the maximum drawdown must be survivable without changing behavior, because the strategy's edge only pays if you are still following it when recovery starts.
Why does a 50% drawdown need a 100% gain to recover?
Because the base changed: losing half of 10,000 leaves 5,000, and returning to 10,000 requires doubling 5,000. The required gain is 1/(1-d) - 1 for a drawdown of d. This asymmetry is the entire argument for small risk per trade.
Related terms & reading
Related terms: R-multiple · Overtrading
Keep reading: Risk Management for Beginner Traders: Size, Stops and Drawdown · What Is the Risk/Reward Ratio? How to Calculate R:R (Beginner's Guide) · How to Set a Daily Loss Limit You Actually Keep
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Educational content, not financial advice. Definitions describe trading behavior and risk concepts in general terms; they are not a recommendation to buy, sell or hold any instrument. AI-generated analysis. Not financial advice. Always do your own research.