The short answer
Drawdown is the drop from your account's highest point to its lowest before a new high. It matters because recovery is asymmetric: a 20% drawdown needs a 25% gain to recover, a 50% drawdown needs 100%, and a 90% drawdown needs 900%. Deep drawdowns are mathematically and psychologically almost impossible to come back from — which is why keeping per-trade risk small, so a normal losing streak can only cause a shallow drawdown, is survival, not caution.
What is drawdown?
Drawdown measures the decline from a peak in your account equity to the subsequent trough. If you grow $10,000 to $12,000 and then fall to $10,800, your drawdown is $1,200, or 10% from the peak. It is the single best measure of the pain a strategy inflicts along the way.
Returns tell you where an account ended; drawdown tells you what you had to endure to get there. Two strategies with the same return but very different drawdowns are not remotely the same trade.
The asymmetric recovery math
Losses and gains are not symmetric, and this is the most important table in risk management:
- Lose 10% → need +11% to recover.
- Lose 20% → need +25%.
- Lose 50% → need +100%.
- Lose 90% → need +900%.
The deeper the hole, the more disproportionately hard it is to climb out, because you are compounding from a smaller base. This is why avoiding deep drawdowns matters far more than any single big win.
Risk of ruin
Risk of ruin is the probability that a string of losses wipes out your account before your edge plays out. It rises sharply with the percentage you risk per trade: risking 10% per trade, a run of losses that is entirely normal can be fatal; risking 1%, the same run is a minor dip.
Even a positive-expectancy strategy can ruin you if you size too large, because you can go broke before the average asserts itself. Small size is what keeps you at the table long enough for the edge to work.
Losing streaks are normal
With any realistic win rate, long losing streaks are not bad luck — they are statistically expected. A strategy that wins 45% of the time will, over hundreds of trades, routinely string together 6, 8, even 10 losses in a row. Planning for that is the difference between a survivable dip and a blown account.
Size so that your worst plausible streak produces a drawdown you can tolerate financially and emotionally. The losing-streak calculator on this site makes those odds concrete.
Controlling drawdown
You control drawdown mainly through one dial: risk per trade. Cap it at around 1% and your worst streaks stay shallow; push it to 5% and a normal streak becomes a crisis. Correlated positions count as one risk — three long dollar trades are not three independent bets.
Some traders add a rule: after a fixed drawdown (say 6%) in a period, cut size or stop for a while. Protecting the downside is not timidity; it is the precondition for the upside ever mattering.
Drawdown and psychology
Drawdown is not only a number; it is where discipline breaks. Deep drawdowns tempt revenge trading, oversizing to “win it back,” and abandoning a working plan at the worst moment. The financial hole and the psychological hole feed each other.
Shallow drawdowns, by design, keep you calm enough to keep following the plan. That is the real reason to keep risk small: it protects your decision-making, not just your balance. Log the streak in your journal and keep executing.
Frequently Asked Questions
What is drawdown in trading?
Drawdown is the decline from your account's peak equity to its lowest point before a new high. It measures the loss you have to endure along the way, and is a better gauge of a strategy's pain than its return alone.
Why is recovering from a drawdown so hard?
Because recovery is asymmetric: you compound back from a smaller base. A 20% loss needs a 25% gain to recover, a 50% loss needs 100%, and a 90% loss needs 900%. The deeper the drawdown, the disproportionately harder the recovery.
What is risk of ruin?
Risk of ruin is the probability that a losing streak wipes out your account before your edge plays out. It rises sharply with the percentage risked per trade, which is why small per-trade risk is essential even with a positive-expectancy strategy.
How do I control drawdown?
Mainly by capping risk per trade — around 1% keeps worst-case streaks shallow. Treat correlated positions as one risk, and consider a rule to cut size after a set drawdown in a period.
Are losing streaks normal?
Yes. With realistic win rates, runs of 6 to 10 consecutive losses happen routinely over hundreds of trades. They are statistically expected, so position size should assume them rather than hope they do not occur.