Maximum Drawdown in Trading: Definition, Formula, and How to Calculate It

Maximum drawdown (MDD), often shortened to max drawdown, is the largest peak-to-trough decline in an account's value over a given period, expressed as a percentage of the peak. The formula is MDD = (Trough Value minus Peak Value) divided by Peak Value. It measures the worst loss an account suffered from a high point, which makes it the clearest single gauge of downside risk and the hard floor most prop firms use as a fail limit.

Maximum drawdown is the number I check first on any track record, whether it is mine, a student's, or a strategy I am evaluating. Average return tells you how good the good times were. Max drawdown tells you how bad the bad times got, and the bad times are what end trading careers. In 19 years I have seen far more accounts destroyed by a single ugly drawdown than by a lack of winning ideas.

For anyone trading with a prop trading firm, maximum drawdown is not just a risk metric. It is usually the exact rule that fails your account if breached. So understanding what it is, how it is calculated, and how to keep it small is fundamental. This guide covers the definition, the formula with worked examples, what counts as a good maximum drawdown, how it differs from other drawdown types, and how it applies to a funded evaluation. The hub guide on what is drawdown in trading sets out the broader concept first.

What Is Maximum Drawdown?

Maximum drawdown is the largest percentage drop from a peak to a subsequent trough in account value before a new peak is reached. If an account grows to $12,000, falls to $9,000, then recovers, its maximum drawdown is the $3,000 decline, a 25% maximum drawdown. It captures the worst loss an investor would have endured holding through that period.

The concept is intuitive once you picture an equity curve. As the account rises and falls, every decline from a high point to a low point before the next high is a drawdown. The single largest of those declines, measured in percentage terms, is the maximum drawdown. It answers the question that matters most for risk: what is the worst this account has ever fallen from a high?

You will see the metric written several ways. Maximum drawdown, max drawdown, and MDD all refer to the same measurement, and trading platforms use the terms interchangeably. MT5 reports it as "Maximal Drawdown."

Maximum drawdown is powerful precisely because it focuses on the downside. Two strategies can post identical average returns while one rode a smooth curve and the other survived a stomach-churning 40% plunge. Their returns look the same, but their maximum drawdowns reveal they are nothing alike. That is why it is a cornerstone metric in forex risk management and why prop firms lean on it as their primary fail condition.

Maximum Drawdown Formula: How to Calculate It

Maximum drawdown is calculated with the formula MDD = (Trough Value minus Peak Value) divided by Peak Value, expressed as a percentage. Identify the highest peak, find the lowest trough that follows it before a new peak forms, and divide the drop by the peak. The result is a negative figure, usually stated as a positive percentage loss.

The max drawdown formula is simple. The discipline is in identifying the right peak and trough. Here is the step-by-step:

1. Track the equity curve over your chosen period.
2. Find each peak, a high point followed by a decline.
3. Find the lowest trough after that peak, before a new higher peak is made.
4. Apply the formula: (Trough minus Peak) divided by Peak.
5. Take the largest such decline across the whole period. That is your maximum drawdown.

A worked example on a $10,000 account:

• Account rises to a peak of $15,000.
• It then falls to a trough of $9,000 before recovering.
• MDD = ($9,000 minus $15,000) divided by $15,000 = minus $6,000 divided by $15,000 = minus 40%.

So this account had a 40% maximum drawdown. Note that the reference is the peak ($15,000), not the starting balance ($10,000). A common error is dividing by the starting capital, which understates the drawdown. Note too the recovery math this implies: a 40% drawdown requires a 66.7% gain just to return to the peak, which is why keeping MDD low matters so much.

Maximum Drawdown vs Average Drawdown

Average drawdown is the mean of all drawdowns over a period, while maximum drawdown is the single worst one. Average drawdown describes typical pain, and maximum drawdown describes worst-case pain. Risk management focuses on the maximum because it is the tail event, the one large enough to end an account or breach a limit.

Both metrics have value, but they answer different questions. Average drawdown tells you what a normal rough patch looks like. Maximum drawdown tells you how bad it got at the very worst. For survival, the maximum is what counts. You do not blow up on an average day, you blow up on the worst one. Sizing and limits should be built to withstand the maximum, not the average.

What Is a Good Maximum Drawdown?

A good maximum drawdown is generally under 20%, with many professional traders and funds targeting 10% or lower. Below 10% is considered excellent and reflects tight risk control. A range of 20 to 30% is acceptable but demanding to recover from. Above 50% is severe, requiring a gain of more than 100% just to break even. Lower is always better, all else equal.

There is no universal threshold, but useful benchmarks exist. A max drawdown under 10% signals disciplined risk control, because the account never fell far from its peak, so recovery is quick and the strategy is psychologically sustainable. A 20% MDD is workable but means a 25% gain is needed to recover. Once you are past 30 to 50%, the recovery math turns brutal, and above 50% most accounts never come back. This is the entire argument for keeping drawdowns shallow, covered in depth in the guide on recovering from a drawdown (internal link pending, cluster sibling publishing together).

The reason lower is better is not just comfort. It is mathematics. Because losses compound asymmetrically, every increment of drawdown demands a disproportionately larger gain to recover, so shallow drawdowns keep you in the recoverable zone where your edge can actually work.

Static vs Trailing Maximum Drawdown

A static maximum drawdown is measured from a fixed reference, usually the starting balance, and never moves. A trailing maximum drawdown follows the account's peak upward and locks in gains. Static is predictable, a constant breach level, while trailing tightens as you profit and can be breached even while the account is in overall profit.

In prop trading, the maximum drawdown comes in these two flavours, and the difference is decisive:

The full mechanics of the trailing variant, including end-of-day, intraday, and locked-in versions, are covered in our guide to trailing drawdown. For the purposes of maximum drawdown, the key point is that a static maximum is far easier to trade around because your fail level is a fixed number that never chases your equity.

Maximum Drawdown in a Prop Firm Evaluation

In a funded evaluation, maximum drawdown is usually the primary fail rule. Breach it and the account ends permanently. Pipcy uses a static maximum: a 12% absolute drawdown from the starting balance on Pipcy Classic, and a fixed 250-pip maximum loss on Pips Mastery. Because it is static and there is no daily or trailing limit, your breach level is one fixed, knowable number.

For a challenge trader, maximum drawdown is the line that matters most, because crossing it is game over. That is why the type of maximum drawdown a firm uses is so important. A trailing maximum forces you to track a moving target and can end your account while you are up. A static maximum gives you a single fixed floor to plan around.

Pipcy uses the static, trader-friendly version. On the Pipcy Classic challenge, the maximum is a 12% absolute drawdown measured from your starting balance, fixed for the life of the account. On the Pips Mastery Challenge, it is a fixed 250-pip maximum loss. Neither challenge adds a daily drawdown or a trailing component, so you are never juggling multiple moving limits, a structural choice that makes disciplined risk management far more straightforward. Avoiding a maximum-drawdown breach is, in the end, the same discipline that determines why most traders fail prop challenges, and the Pipcy Classic vs Pips Mastery comparison shows how each limit is structured.

Understanding Your Drawdown Limit

A drawdown limit is the maximum loss a firm allows before closing the account. It is the rule version of the metric: maximum drawdown measures what happened, while the drawdown limit defines what is permitted. Knowing whether your limit is static or trailing, and where it sits in absolute terms, is the first calculation to run on any funded account.

Work out your breach level in currency before your first trade rather than in the middle of a losing week. On a $50,000 account with a 12% static limit, your floor is $44,000, and that number does not change for the life of the account. Under a trailing limit the same calculation has to be repeated every time you make a new equity high, which is precisely why static limits are easier to manage.

How to Keep Maximum Drawdown Low

Keep maximum drawdown low by risking a small, fixed percentage per trade (1% or less), maintaining a positive reward-to-risk ratio, avoiding correlated positions that lose together, and setting account-level loss limits. Because drawdown is driven mainly by risk per trade and losing-streak length, conservative sizing is the single most effective control.

The levers that hold max drawdown down:

• Small risk per trade. At 1% risk, even a 10-trade losing streak is roughly a 10% drawdown, which is recoverable. At 5% risk, the same streak is catastrophic.
• Positive reward-to-risk. Winners larger than losers mean drawdowns are refilled faster when the streak ends.
• Avoid correlation. Stacking correlated positions turns several small risks into one large one, deepening drawdowns.
• Account-level limits. A personal maximum-drawdown ceiling that triggers a pause and review before the firm's hard limit is reached.

All of these reduce either the size of individual losses or the length of the streak that produces the drawdown, the two variables that determine how deep it gets.

Why Maximum Drawdown Matters More Than Returns

Maximum drawdown matters more than headline returns because it reveals the risk taken to earn them and dictates recovery difficulty. Two strategies with identical average returns can have completely different maximum drawdowns, and the one with the deeper drawdown is both harder to recover from and far more likely to be abandoned or to blow up.

Consider two traders who each averaged 15% a year. Trader A rode a smooth curve with a 9% maximum drawdown. Trader B posted the same 15% but endured a 45% maximum drawdown along the way. On paper their returns are identical. In reality they are not remotely comparable:

• Recovery burden. Trader A's 9% drawdown needs roughly a 10% gain to recover. Trader B's 45% drawdown needs an 82% gain, a mountain that can take years.
• Survivability. Trader B's account came within a whisker of the zone where recovery becomes near-impossible. One slightly worse run and the account is finished.
• Psychology. Almost no one holds through a 45% drawdown without abandoning the plan, cutting size at the bottom, or revenge trading. The drawdown itself changes behaviour.

This is why professional allocators judge a track record on risk-adjusted terms, and why maximum drawdown often gets read before the return figure. A high return built on a deep drawdown is a warning, not an achievement. The smooth curve is worth more than the flashy one.

Common Mistakes When Reading Maximum Drawdown

The common mistakes are dividing by the starting balance instead of the peak, ignoring the recovery asymmetry, judging returns without checking maximum drawdown, and confusing a static limit with a trailing one. Each leads to underestimating either the true risk taken or the difficulty of recovering from it.

Errors that distort how people read the number:

• Dividing by the deposit, not the peak. This understates the drawdown. The correct denominator is the peak value.
• Ignoring the recovery math. Treating a 50% drawdown as half as bad as a 25% one, when it actually needs four times the recovery gain (100% vs 25%).
• Chasing return, ignoring risk. Picking a strategy or track record on return alone without checking how deep the drawdown got to earn it.
• Static and trailing confusion. Assuming a firm's maximum limit is fixed when it trails your peak, or the reverse, a mistake that leads directly to breaches.

Reading maximum drawdown correctly is half the value of the metric. The other half is acting on it by keeping your own drawdown shallow.

Frequently Asked Questions

What is maximum drawdown?

Maximum drawdown, often shortened to max drawdown or MDD, is the largest percentage decline from a peak to a subsequent trough in account value before a new peak is reached. It measures the worst loss an account endured from a high point, which makes it the clearest single gauge of downside risk. In prop trading it is typically the primary rule that fails an account if breached.

How do you calculate maximum drawdown?

Use the formula MDD = (Trough Value minus Peak Value) divided by Peak Value, expressed as a percentage. Find the highest peak, then the lowest trough that follows it before a new peak forms, and divide the decline by the peak. For example, a fall from a $15,000 peak to a $9,000 trough is (9,000 minus 15,000) divided by 15,000, which is a minus 40% maximum drawdown.

What is a good maximum drawdown?

A good maximum drawdown is generally under 20%, and many professionals target 10% or lower. Below 10% reflects excellent risk control and quick recovery. A range of 20 to 30% is acceptable but harder to recover from. Above 50% is severe and requires a gain of more than 100% just to break even. Because losses compound asymmetrically, lower maximum drawdown is always better.

What is the difference between maximum drawdown and daily drawdown?

Maximum drawdown is the largest loss from the account's peak over its entire lifetime and never resets. Daily drawdown is the most you can lose in a single day and resets each session. Maximum drawdown protects total capital as a permanent floor, while daily drawdown limits damage day by day. Prop firms often use both at the same time.

Is maximum drawdown measured from the starting balance or the peak?

Maximum drawdown is measured from the peak, not the starting balance. The formula divides the peak-to-trough decline by the peak value. Measuring from the starting balance is a common error that understates the drawdown. Note that prop firms may set their maximum-drawdown limit from either the starting balance (static) or the peak (trailing), which is a separate rule choice.

What maximum drawdown does Pipcy use?

Pipcy uses a static maximum drawdown with no daily or trailing limit. Pipcy Classic applies a 12% absolute drawdown measured from the starting balance, and Pips Mastery applies a fixed 250-pip maximum loss. Because the limit is static, your breach level is a fixed, known number that never trails your equity, which makes risk planning straightforward.

Maximum drawdown is the number that separates track records that look alike on returns but are worlds apart on risk. It measures the worst peak-to-trough fall an account suffered, it is calculated from the peak rather than the deposit, and lower is always better because of the punishing recovery math. Keep it shallow with small per-trade risk and positive reward-to-risk, and you keep your account in the zone where it can actually compound.

In a funded evaluation, maximum drawdown is usually the rule that fails you, so the type matters. Pipcy uses a static 12% absolute drawdown on Classic and a fixed 250-pip limit on Pips Mastery, with no daily or trailing limit, so you plan around one fixed number. If a clean, predictable risk framework appeals, the Pips Mastery Challenge and Pipcy Classic offer up to 95% profit split, 48-hour payouts, and free Pipcy Academy access.

Written by Vladimir Rybakov, Head of Pipcy Academy. Vladimir is a CFTe-certified financial technician with 19 years of market experience and the founder of Home Trader Club.

Fact-checked by Snir Ahiel, former co-founder of The5ers and risk management specialist at Pipcy, with 15+ years trading Forex, Stocks, and Options.

Risk disclosure: Trading foreign exchange carries a high level of risk and may not be suitable for all investors. Pipcy provides simulated trading evaluations. Past performance and backtested results are not indicative of future results. Nothing in this article constitutes financial advice.