What Is Drawdown in Trading?

Drawdown is the decline in an account's value from a previous peak to a subsequent low, expressed as a dollar amount or, more commonly, a percentage. If an account grows to 10,000 and then falls to 8,500 before recovering, the drawdown was 1,500, or 15 percent, measured from that peak, regardless of what the account did before reaching it or after recovering from it.

Drawdown is not the same as a loss on a single trade. A single losing trade is one data point. Drawdown measures the cumulative decline across a losing stretch, however many trades it takes, from the highest point the account reached to the lowest point before a new equity high is set.

Maximum drawdown vs daily drawdown

Maximum drawdown is the largest peak-to-trough decline an account has experienced over its full history, usually expressed as a percentage of the peak value. It answers a single question: how bad did the worst losing stretch actually get.

Daily drawdown, most relevant on prop firm challenge accounts, measures the decline within a single trading day, typically reset each day from either a fixed starting balance or the previous day's closing equity depending on the firm's rules. This distinction matters because daily drawdown is the limit that actually ends most prop firm challenges, since it resets constantly and constrains every single session, while maximum drawdown is a larger, more forgiving ceiling measured over the account's entire lifetime.

How to calculate drawdown

Drawdown is calculated as: (Peak value − Trough value) ÷ Peak value × 100.

An account that peaks at 20,000, then falls to 17,000 before recovering, has a drawdown of (20,000 − 17,000) ÷ 20,000 × 100 = 15 percent. The drawdown is measured from the peak, not from the account's starting balance, which is why an account can be profitable overall and still have experienced a significant drawdown along the way.

Why drawdown matters more than a single loss

A strategy's average result can look identical whether its equity curve moved in a smooth, gradual line or dropped sharply before recovering, but the two are not equally survivable. A strategy with strong average expectancy and a drawdown deep enough to breach a prop firm's limit, or deep enough that recovering it requires an unrealistic gain, is not a usable strategy regardless of how good its long-run average looks.

Recovering from a drawdown also gets mathematically harder the deeper it goes. A 10 percent drawdown requires an 11 percent gain to recover. A 50 percent drawdown requires a 100 percent gain. This asymmetry is why controlling how deep a drawdown is allowed to get matters more, in practical terms, than most single-trade decisions.

Drawdown depth and the gain needed to recover

Tracking drawdown as it happens, not after

Maximum and daily drawdown are usually calculated after the fact, from an account's closing balance history. On a prop firm challenge specifically, the more useful number is how much of today's daily limit has already been used while the session is still open, since that is what determines whether the next trade can safely be taken at all. A trading journal that tracks running distance to both limits after every closed trade turns drawdown from a number discovered at the end of a bad day into a live constraint that can be watched during the session itself.

This article is for educational purposes only and is not financial or investment advice. Trading with leverage carries a high risk of loss. Past performance does not guarantee future results.

Track daily and maximum drawdown against your actual account limits, live as trades close, in the BitStat trading journal.