The Trader's Guide to Drawdown
Drawdown is how far your account falls from its highest point before it climbs back, usually measured as a percentage. If your balance grows to $10,000 and then dips to $8,000 before recovering, that's a 20% drawdown. It matters because it measures the pain of a strategy, not just its reward. Two strategies can end the year up the same amount, but the one that dropped 40% along the way is far harder to hold through than the one that only dropped 10%. Drawdown also decides survival, since a 50% loss needs a 100% gain just to get back to even. Every real strategy has drawdowns, so the goal isn't to avoid them but to know how deep and how long they tend to get, and whether you could actually stomach them with real money on the line.
What drawdown measures, how to interpret max drawdown and drawdown duration, and what those numbers mean for real trading conditions.
Key points
- Drawdown measures the drop from a peak to a low point, showing the worst stretch a strategy put you through.
- Maximum drawdown is the single deepest fall, and it's one of the most important risk numbers to check.
- Losses hurt more than equal gains help, since a 50% drawdown requires a 100% gain to recover.
- Two strategies with the same final return can feel completely different depending on how deep their drawdowns ran.
- Drawdown length matters as much as depth, because a strategy can sit underwater for months, which is hard to hold through.
- Knowing your likely drawdown ahead of time helps you size positions so a normal losing streak doesn't force you to quit.
Frequently asked questions
What is drawdown in trading?
Drawdown is the drop in your account value from a recent high to a following low, shown as a percentage. It captures how much you'd have been down at the worst moment, which is a truer measure of risk than the final result alone.
What is a good maximum drawdown?
It depends on how much volatility you can handle, but many traders get uncomfortable once drawdowns pass 20 to 30%. The important thing is that the drawdown fits what you can actually sit through without abandoning the plan, since quitting at the bottom locks in the loss.
Why does a big drawdown take so long to recover?
Because percentages aren't symmetric. A 20% loss needs a 25% gain to recover, a 50% loss needs a 100% gain, and an 80% loss needs a 400% gain. The deeper the hole, the harder it is to climb out.
How is drawdown different from a normal loss?
A single loss is one trade. Drawdown is the cumulative decline across many trades from your peak, so it captures a whole losing streak rather than one bad result. It shows the worst the ride got, not just one moment.
How do I see the drawdown of a strategy before risking money?
When the AlgoAgent backtests an idea, it reports maximum drawdown and shows the equity curve, so you can see how deep and how long the rough patches got and decide honestly whether you could hold through them.
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This content is for educational purposes only and does not constitute financial advice. Trading involves risk, including possible loss of capital.