Maximum drawdown is the single number that tells you how badly a trading account or portfolio has hurt its owner. It measures the biggest fall from a peak to a later low, and it answers a question that returns never do: how much pain did it take to earn those gains?
This guide explains maximum drawdown in plain language, shows the formula and the recovery math, looks at what history says about the S&P 500, and covers how prop firm rules turn the number into a hard wall. Then it gives seven brutal truths and a plan you can use before the next losing streak.
Key Takeaways
- Maximum drawdown is the largest peak-to-trough fall in account value before a new high is reached.
- The formula is (peak minus trough) divided by peak, so a rise from 15,000 to a low of 12,000 is a 20% drawdown.
- Recovery gets harder faster than losses grow: a 20% loss needs a 25% gain, and a 50% loss needs a 100% gain.
- The S&P 500’s worst drawdown since 1871 was about 82% in 1929-1932, and it took until 1945 to recover on a total-return basis.
- Prop firms often cap maximum drawdown at 6% to 10%, with a daily loss limit that can close the account.
- Backtests understate the future maximum drawdown, so set limits below the number you can bear.
- Decide your maximum drawdown limit, and your response to it, before you place the first trade.
What Is Maximum Drawdown?
Maximum drawdown is the largest fall in value from a peak to the next trough, measured before a new peak is made. A drawdown is any decline from a high. Maximum drawdown is the worst of them over a chosen period. It shows the worst outcome a strategy has produced so far.
The usual formula is simple: maximum drawdown equals peak equity minus trough equity, divided by peak equity, times 100. If equity rises to 15,000, falls to 12,000 and then recovers, the maximum drawdown is 20%.
This matters because average returns hide the road taken. Two accounts can both finish the year up 15%, yet one dipped 8% along the way and the other dipped 35%. The second owner probably did not enjoy the ride, and may not have stayed in it.
Maximum Drawdown vs Everyday Drawdown
Every account has drawdowns most of the time. Whenever equity sits below its previous high, you are in one. The maximum drawdown is the deepest of those episodes, while the current drawdown is where you stand today.
Traders usually track three related ideas:
- Current drawdown: how far equity is below its latest high right now.
- Worst fall: the deepest such decline over the whole record.
- Time underwater: how long it took to climb back to a new high.
An account can have a small maximum drawdown and still spend a long time underwater. That makes the number useful but not complete, which is why this guide treats depth and duration together.
Absolute and Relative Maximum Drawdown
Two versions of the number are common. Relative drawdown measures the fall as a percentage of the peak. Absolute drawdown measures the fall below your starting balance, in money.
For example, a 5,000 deposit that falls to 4,200 has an absolute drawdown of 800. A 12,000 peak that falls to 10,500 has a relative drawdown of 12.5%. Platforms and brokers display these differently, so check which one your report uses.
For comparing strategies, relative maximum drawdown is the better tool. It lets you compare a 1,000 account with a 100,000 account on the same scale. For checking against a firm’s rule, you may need the dollar version, because many rules are written in money terms.
Truth 1: Losses and Recoveries Are Not Symmetrical
The first brutal truth is that recovery math works against you. If an account loses 50%, a 50% gain does not bring it back. It needs a 100% gain. The general formula is 1 divided by (1 minus the loss), minus 1.
According to a Pepperstone guide to drawdown, the gains required to recover rise quickly:
| Maximum drawdown | Gain needed to recover |
|---|---|
| 10% | 11.1% |
| 20% | 25% |
| 30% | 42.9% |
| 40% | 66.7% |
| 50% | 100% |
Look at the jump between 30% and 50%. The loss grew by two-thirds, but the required gain more than doubled. That is why professionals treat a deep maximum drawdown as a threat to survival, not a fee for doing business.
Truth 2: The Worst Drawdown Is Usually Still Ahead
Your recorded maximum drawdown is only the worst one that has happened so far. Markets can produce a worse one next month. A backtest that shows a 12% maximum drawdown does not promise that 12% is the limit.
Three reasons explain why history understates risk. The future may contain conditions your data never saw. Live trading adds slippage, delays and emotion. And the longer you trade, the more chances you give a rare event to arrive.
A practical rule is to assume the real maximum drawdown will be larger than the backtest shows, often by a wide margin. If a system needs a drawdown no bigger than 10% to remain tradeable, find one whose history shows well under that.
For more on testing strategies properly before risking money, see our guide on the essential guide to backtesting on historical data.
Maximum Drawdown in History: What the S&P 500 Teaches
Long data shows how deep and how slow drawdowns can be. The DQYDJ S&P 500 drawdown history, which uses Robert Shiller’s dataset with dividends reinvested and was last updated October 27, 2026, lists the worst episodes since 1871.
| Peak | Trough | Depth | Total time underwater |
|---|---|---|---|
| Sep 1929 | Jun 1932 | -81.76% | 184 months |
| Oct 2007 | Mar 2009 | -49.04% | 58 months |
| Aug 2000 | Feb 2003 | -41.56% | 74 months |
| Jan 1973 | Dec 1974 | -39.16% | 42 months |
| Aug 1987 | Dec 1987 | -26.04% | 21 months |
Two lessons stand out. First, even the world’s most studied equity index has lost nearly half its value in modern times. Second, recovery took years, not weeks. The 2000 peak did not recover until October 2006.
One caution: the data uses monthly averages, so sharp but short drops, such as the 2020 crash, barely register. Real intramonth maximum drawdown can be deeper than shown.
Truth 3: Time Underwater Is a Hidden Cost
The second brutal truth is that depth is only half the damage. Time matters just as much. A portfolio that takes 58 months to recover, as the 2007 peak did, costs years of compounding, plus the opportunity cost of what else the money could have done.
For a trader, long periods underwater cause decisions to deteriorate. People abandon good systems, add risk to catch up, or stop trading altogether. The strategy may be fine, but the owner is not.
When you review any record, ask two questions. How deep was the maximum drawdown? How long did it last? A strategy that loses 15% and recovers in three months is very different from one that loses 15% and needs two years.
Tracking both numbers in a journal makes the pattern visible. For more on building that habit, see our guide on the mindset revolution of forex trading journaling.
Truth 4: Prop Firms Turn Maximum Drawdown Into a Wall
Funded-trading programs turn the concept into a hard rule. Break it, and the account closes. According to a guide from Tradetanto on prop firm drawdown rules, there are three main designs:
- Static: the floor is fixed at a percentage of the starting balance and never moves.
- Trailing intraday: the floor rises with live equity, including open profit, and does not fall back.
- Trailing end-of-day: the floor updates only from closing balances.
On a 100,000 account with a 10% static limit, equity cannot fall below 90,000. A trailing limit is trickier. If a trade reaches a new high while open and then reverses, an intraday trailing floor may already have risen, so you can be closed out without ever banking a winner.
The same source lists typical examples for forex and CFD programs. FTMO’s 2-Step uses a static 10% with a 5% daily limit, and FundedNext’s Stellar 1-Step uses a static 6% with a 3% daily limit. Rules change often, so confirm current terms with each firm.
Truth 5: Leverage and Correlation Multiply the Damage
The fifth truth is that maximum drawdown is not only about how often you lose. It depends on how much you risk and how your positions relate to one another.
Leverage raises both profits and drawdowns. A trader who risks 5% per trade needs only a short losing run to reach a 20% drawdown, while a trader who risks 1% would need many more losses in a row. Commonly cited guidance is to risk around 1% to 2% per trade.
Correlation is the quieter risk. Five long positions in assets that move together behave like one large position. If the market turns against them, they lose at the same time, and the maximum drawdown arrives as a single event.
Count related positions as one idea when you size risk. Doing that is the simplest way to keep a bad day from becoming a bad month.
Truth 6: Your Psychology Peaks When the Drawdown Does
The sixth truth is behavioral. The deeper a maximum drawdown gets, the more likely a trader is to make the mistakes that deepen it.
Typical errors are revenge trading, doubling size to win back losses quickly, moving stops, and abandoning a plan after a short cold streak. All of them feel logical in the moment. All of them turn a manageable drawdown into a dangerous one.
Pepperstone’s guide also notes that trying to recover losses quickly tends to make drawdowns worse and that a short break can help. That advice sounds simple, but it works because it interrupts the loop of loss and impulse.
For more on handling fear and greed during losing runs, see our guide on trading psychology and managing emotions and biases.
Truth 7: Your Limit Must Be Set in Advance
The seventh truth is the one that protects you. You must choose your maximum drawdown limit before the first trade, not during the damage.
Professional funds reportedly target a maximum drawdown of around 10% to 20%, according to a HackerNoon analysis of drawdown math. That article also argues that position size, leverage and the number of concurrent trades should come from the maximum acceptable account drawdown, not from conviction in a trade.
That is a useful shift. Instead of asking how much you might make, you start with how much you can lose, then size backward. Your limit should be lower than the level that would make you quit, and lower than any hard rule you must obey.
How to Calculate Maximum Drawdown Yourself
You can compute maximum drawdown in a spreadsheet in a few steps.
- List your account equity after every trade or every day.
- In a second column, track the running peak, which is the highest equity so far.
- In a third column, compute (equity minus running peak) divided by running peak.
- The lowest value in the third column is your maximum drawdown.
The same logic works in code. The key is always the running peak, because a drawdown is measured from the last high, not from the start.
Review the result by trade count, not only by dollars. If your longest losing streak is nine trades, ask what a streak of fifteen would do to your account at your current risk per trade. That stress test often reveals that size is too large.
A Maximum Drawdown Ladder for Your Trading Plan
A ladder gives you pre-agreed actions as the drawdown deepens. Every number below is an example, so adjust it to your own tolerance.
| Drawdown from peak | Action |
|---|---|
| 5% | Review the last trades for errors and keep size unchanged |
| 10% | Cut risk per trade by about half |
| 15% | Stop trading for a set period and review the full journal |
| 20% | Pause live trading, retest the system and return only with a written plan |
Traders such as the Turtles reportedly reduced their trading unit as drawdowns grew, which slows damage during bad streaks and preserves capital for recovery. The principle is what matters: smaller size in a drawdown.
Write the ladder down. A rule you have not written is a rule you will negotiate with yourself when you are losing. Keep it somewhere visible, review it every month, and change it only when you are calm and the account is healthy, never in the middle of a losing run when fear is doing the thinking.
Maximum Drawdown and Return: The Calmar View
A strategy’s return only means something next to the pain it caused. The Calmar ratio divides annual return by maximum drawdown, so a system earning 24% a year with a 12% maximum drawdown scores 2.0.
Higher is better, but the number is only as reliable as the period behind it. A short, calm sample can flatter any strategy.
Use the ratio to compare options, not to predict results. Two systems with the same return but different drawdowns are not equal. The one with the smaller maximum drawdown lets you keep position size steady, stay calm and compound without interruption.
A Worked Example: Two Traders, One Bad Month
Numbers make the lesson concrete. Imagine two traders who each start with 20,000 and both lose five trades in a row.
Trader A risks 1% per trade. After five losses, the account is near 19,000, a drawdown of about 5%. A single winning week can repair it, and the trader’s plan is untouched.
Trader B risks 5% per trade. After five losses, the account is near 15,500, a drawdown of roughly 22.6%. Recovery now needs a gain of about 29%, and the temptation to win it back quickly is strong.
Both traders had the same win rate and the same bad luck. Only risk per trade differed, and that alone separated a routine setback from a crisis. This is why a limit expressed as a maximum drawdown should shape size before the first order is placed.
Maximum Drawdown Across Markets: Stocks, Forex and Crypto
Different markets produce different depths. Large equity indexes have lost 40% to 50% in modern crashes, as the S&P 500 table shows. Currency pairs often move less over a year, but leverage can make an account’s drawdown far larger than the pair’s own.
Crypto sits at the extreme. According to the HackerNoon analysis, Bitcoin fell from about 69,000 dollars in November 2021 to about 15,500 dollars a year later, a 77.6% drawdown, and the article says recovery took roughly three years. Treat those as approximate figures from a single source.
The lesson is not to avoid any market. It is to match size to the asset. A position that suits a slow currency pair may be far too large for a volatile token, and the same maximum drawdown limit can be hit within days.
Quick Self-Check: Is Your Maximum Drawdown Plan Ready?
Answer these questions honestly before the next session.
- Do you know the largest drawdown in your own record, in percent?
- Do you know how long your longest recovery took?
- Have you written a number at which you stop trading?
- Is that number lower than any firm or broker rule you must follow?
- Can you describe what you will do at 5%, 10% and 15%?
If you answered no to two or more, you do not yet have a plan. Fixing that takes an hour and costs nothing, which makes it the best return on time in trading.
Common Mistakes With Maximum Drawdown
Even traders who know the concept slip. The most common errors are easy to list.
- Trusting a short backtest. Two good years say little about the worst case.
- Ignoring open profit. On trailing rules, unrealized gains can raise your floor.
- Mixing absolute and relative figures. The two can differ greatly.
- Setting a limit you cannot bear. If a 25% loss would make you quit, a 25% limit is useless.
- Chasing recovery. Bigger bets to win back losses create deeper holes.
- Having no stop-trading rule. Without one, the account decides for you.
Avoiding these six mistakes will not remove losing periods. It will help you survive them, keep your confidence intact and stay in the game long enough for your edge to matter.
Maximum Drawdown FAQ: Quick Answers
What counts as a good number? It depends on the strategy and the person, but professional funds are reported to aim for roughly 10% to 20%.
How is it different from a stop-loss? A stop-loss limits one trade, while this measure covers the account’s whole fall from its peak.
Does a small number mean a safe strategy? Not necessarily, because a short record may simply not have met a bad period.
Can I recover from a large drawdown? Yes, but the required gain rises quickly, from 25% after a 20% loss to 100% after a 50% loss.
Is this financial advice? No. It is educational only, and every limit shown here is an example.
Conclusion: Survive First, Then Compound
Maximum drawdown is the honest scorecard of any trading record. It shows what a strategy cost, not only what it earned. The seven truths come down to one idea: protect the downside, because recovery math punishes every extra point of loss.
Start with your limit, build a ladder of actions, size positions from the amount you can lose, and track both depth and time underwater. History shows that even the strongest markets can stay below their highs for years.
Traders who last are rarely the ones who find the biggest winners. They are the ones who never let one bad stretch decide the outcome.
The bottom line: Set your maximum drawdown limit before you trade, size every position to respect it, and treat survival as the first goal of compounding.
Disclaimer
This article is for educational and informational purposes only and does not constitute financial, investment or trading advice. Trading and investing involve substantial risk, including the possible loss of your capital. Figures come from third-party sources, may differ across outlets and may change after publication. Drawdown limits and ladders shown are examples, not recommendations. Past performance does not guarantee future results. Always do your own research and consult a licensed financial adviser before making decisions.