Maximum Drawdown Explained: Formula, Types and Real Limits

By Lenka Rož Schánová · Operations & Risk, For Traders

Max DD is shorthand for maximum drawdown — the largest peak-to-trough fall in account equity over a period, measured as (Trough − Peak) ÷ Peak × 100. On a $100,000 account that peaks at $112,400 and falls to $98,900, max DD is −12.01%, not −1.1%.

Key takeaways

• Max DD, MDD and maximum drawdown are the same metric: the deepest peak-to-trough equity decline, expressed as a negative percentage of the peak — never of the starting balance.
• The formula is MDD = (Trough − Peak) ÷ Peak × 100, where the peak is the running high-water mark at the time, not the final balance.
• Prop firms measure drawdown in four different ways — static, trailing, end-of-day trailing and intraday floating — and the same 12-trade sequence can pass one model and breach another.
• The daily loss limit and the max drawdown are separate rules with separate triggers; you can be comfortably inside one and breached on the other in the same session.
• An 8–10% ceiling buys roughly 8–10 full-risk losses at 1% per trade before slippage, and only 4–5 at 2% — which is why sub-6% self-imposed budgets pass more evaluations.
• Recovery is asymmetric: −10% needs +11.1% to get back, −33% needs +49.3%, and −50% needs +100%.

Watch: related video

What max DD means in trading

Max DD is short for maximum drawdown — the largest peak-to-trough decline your account equity has suffered over a given stretch, expressed as a percentage of that peak. If you've ever watched a trade log and asked "what is max dd in trading," this is the answer: it's not your current loss, it's the worst drop your equity curve has ever recorded, measured from a high to the lowest point that followed before a new high was made.

Max DD, MDD and maximum drawdown are the same metric

No trick here — max DD, MDD, and "maximum drawdown" all point to the identical number. You'll see MDD in academic papers and fund tear sheets, max DD on prop dashboards and broker statements, and "maximum drawdown" spelled out in rulebooks. Same formula, same meaning: the deepest peak-to-trough decline recorded during the measurement period. If a brief or a rule says one, it applies to all three.

Current drawdown vs maximum drawdown

These two get mixed up constantly, and the mix-up causes real account breaches. Current drawdown is how far below your high-water mark you sit right now — the running peak equity your account has ever touched. Every time equity makes a fresh high, the high-water mark resets upward and current drawdown snaps back to zero. Maximum drawdown is different: it's a permanent record of the worst current-drawdown reading you ever hit, and it doesn't shrink when you recover. You can be fully recovered with 0% current drawdown while your max DD stat still shows −12%. Challenge providers track both, but the max DD breach — hitting the absolute floor even for a second — is usually the one that ends the evaluation, recovery or not.

Equity or closed balance — which one is being measured?

This is the detail that blindsides more traders than any other part of the metric. Most prop rulebooks measure equity, not closed balance — meaning floating losses on open positions count toward your drawdown the instant they exist, before you've clicked a single close button. A trader sitting on a −$3,000 floating position that never gets closed still breaches a max DD limit calculated on equity. Always confirm which the rulebook tracks before you size a position near the edge of your limit; equity-based rules leave far less room than balance-based ones because unrealized losses hit the meter in real time.

You'll find the number itself in a few standard places: the MT5 maximal drawdown field in the platform's strategy/history report (MT4 shows the same line under a slightly different label), on prop dashboards as a live percentage next to your daily loss limit, and in backtest summaries where it's usually reported alongside Sharpe ratio and win rate. Wherever it shows up, it's describing the same peak-to-trough decline — just at a different stage of your trading life.

The maximum drawdown formula (and why the denominator is the peak)

The maximum drawdown formula is simple arithmetic, but almost every mistake traders make with max DD comes from mixing up the terms in it. Write it exactly like this:

MDD = (Trough − Peak) ÷ Peak × 100

Two terms do the work here. The peak is your running high-water mark — the highest equity value your account has touched up to that point in time. The trough is the lowest equity value recorded after that peak and before a new peak is set. Max DD isn't "how far below my starting balance am I" — it's the worst fall from any high point you actually reached. That distinction is the whole section.

Worked example: $100,000 → $112,400 → $98,900

Run the numbers on the scenario from the intro. Your account starts at $100,000, climbs to a peak of $112,400 on a strong run, then gives it back down to $98,900.

Plug the peak and trough into the drawdown formula:

MDD = ($98,900 − $112,400) ÷ $112,400 × 100 = −12.01%

Compare that to the naive read: $98,900 is only −1.1% below the $100,000 starting balance, so a trader skimming the account summary might think the ride was mild. It wasn't. You gave back 12.01% of the capital you actually had in hand at the peak. That's the number a risk model — or a prop firm's dashboard — is going to flag, because it measures real capital that existed and was lost, not just distance from day one.

Building the calculation in a spreadsheet in four columns

You don't need software to reproduce your own max drawdown calculation example — four columns in any spreadsheet does it, built off your daily or per-trade equity log.

Drag columns C and D down the full equity history, then in a separate cell run =MIN(D:D) — that single drawdown spreadsheet formula returns your max DD for the whole period, the most negative value the drawdown column ever hit. It'll land on the exact row where your account was furthest below its own high-water mark, which is usually worth a second look: that's the trade or week that defines your risk profile more than any winning streak does.

Max drawdown vs the daily loss limit

Max DD and the daily loss limit measure different things from different anchors, and mixing them up is how traders get disqualified while staring at a "small" loss. The daily loss limit caps how much you can lose from a fixed daily anchor and resets every broker-day. Max drawdown caps your total distance from your account's all-time high-water mark and never resets — not at rollover, not after a winning week, not ever until the evaluation ends.

Two rules, two triggers, two reset schedules

Think of them as two separate tripwires watching the same account from different heights.

The daily loss limit vs max drawdown comparison matters because they breach independently. You can be perfectly fine on one and breached on the other in the same five minutes.

The session where you're compliant on one and dead on the other

Say your $100,000 account peaked at $108,000 last week. Today you drop 3.8% of your $100,000 starting balance — that's inside a 5% daily cap, no alarm bells. But measured against your $108,000 peak, that same dollar loss puts cumulative equity at 10.2% below the high-water mark. If your ceiling is 10%, you just breached max DD while sitting comfortably under your daily limit. Breach mechanics don't care that you "only" lost 3.8% today — the system checks the peak, not the morning.

Now flip it. You're deep inside your overall ceiling, nowhere near max DD, feeling bulletproof. FOMC drops a hawkish surprise, US100 drawdown on the index whipsaws 1.5% in nine minutes, you take two quick stop-outs trying to fade the move, and you've burned 5.1% of today's anchor before lunch. Daily limit tripped. Your max drawdown cushion was never in danger — irrelevant. The daily rule killed the account first.

Both scenarios pass through the same evaluation math, just from opposite ends.

Which rule actually binds

Budget against whichever ceiling is closer on any given day — and track that it shifts as your equity curve moves. Early in a challenge, with little cushion built up, the daily loss limit usually binds first: one rough NFP session can end you before max drawdown even gets tested. Once you've banked a cushion above your starting balance, the math flips — your high-water mark climbs, and max DD becomes the tighter constraint because it's chasing a higher peak with the same percentage ceiling. Traders who treat these as one generic "risk limit" blow accounts on whichever rule they weren't watching.

What counts as a good max DD

There's no universal good max DD — only a number that fits the return it bought. A −5% drawdown on a strategy that nets 6% a year is mediocre. A −15% drawdown on a strategy that nets 45% a year is excellent. You judge the drawdown against what it financed, not against some round number you saw in a forum post.

Benchmarks by strategy type

Different styles carry structurally different drawdown profiles because they hold risk differently — scalpers are flat most of the day, trend-followers ride open losers for weeks. Here's a rough field guide from live and evaluation accounts across the For Traders platform:

Judging a drawdown number with the Calmar ratio

The Calmar ratio (also called the MAR ratio) answers "was the drawdown worth it": annualised return ÷ max drawdown. A swing gold strategy returning 18% a year with a 15% max DD scores Calmar 1.2 — acceptable. The same return with a 9% max DD scores 2.0 — strong, and worth scaling. This is really a recovery factor calculation stretched over time: how much return did each unit of pain generate.

• ~1.0 — acceptable, the return justifies the risk taken
• ~2.0 — strong, genuine edge showing through
• 3.0+ on a short sample — usually means the strategy hasn't met its worst market yet, not that it's flawless

That last point matters more than the ratio itself. A 4% max DD over 40 trades tells you almost nothing — you haven't sampled a trending gold month, a surprise CPI print, or a correlated pair of XAUUSD positions moving against you at once. Calmar ratios calculated on small samples are optimistic by construction; the drawdown denominator just hasn't had time to grow.

Evaluation targets vs funded-account tolerance

Practically, for a Challenge with a 10% max DD rule, aim to keep realised drawdown under 6% even though the rulebook allows more. That last 4% isn't spare capacity — it's the buffer that absorbs a gap on Sunday open, a slippage event during NFP, or two correlated XAUUSD legs moving together when you thought they were diversified. Traders who pass Evaluation consistently treat the stated limit as the wall, not the target.

Turning your DD ceiling into a loss-streak budget

A max DD ceiling only means something once you translate it into trades: at 1% risk per trade, a 10% drawdown budget buys you 10 consecutive full-risk losers before you're out. That number — not the percentage on the rulebook PDF — is what should drive your position sizing.

How many full-risk losses fit inside 8% and 10%

Drawdown is additive in simple terms when you're thinking in 1R units (1R = one unit of risk per trade, i.e. what you lose if your stop gets hit cleanly). Divide your ceiling by your risk-per-trade setting and you get your loss-streak budget:

At 2% risk per trade, a 10% ceiling gives you five bad trades before you're done — not five bad weeks, five bad trades. That's the kind of budget that gets wiped out by a single volatile NFP session if your stops are wide and your size hasn't adjusted.

The haircut for slippage, spread and correlated positions

The table above is theoretical. Real fills slip, spreads widen around the NFP print and the cash equities open, and your stop rarely exits at the exact level you planned — especially on XAUUSD, where ATR can run $15-20 in a single session and a "clean" stop can cost you an extra 0.1-0.2% of account equity in slippage alone. Then there's correlation: a long XAUUSD position and a long gold-miner-heavy index position aren't two trades, they're one trade at double size when gold rallies or sells off. Two correlated positions moving together can burn through your loss-streak budget twice as fast as the spreadsheet suggests.

Plan on losing 20-30% of your theoretical budget to these frictions. If the maths says you have 10 losers, treat it as 7-8 in practice. That's not pessimism — it's accounting for the gap between a backtest and a live fill during a volatile open.

Why consecutive losers are more common than traders expect

With a 45% win rate — solid, not spectacular — a run of six consecutive losses isn't a black swan. Basic binomial probability puts that streak showing up roughly once every 60-70 trades, which for an active intraday trader can mean once every few weeks. Most traders underestimate this because they picture drawdown as a slow bleed. It's usually a cluster: four or five correlated losers inside a single bad week, often around one high-impact event.

That's the arithmetic case for sizing down. At 2% risk per trade, you're one unlucky but statistically normal week away from breaching the ceiling. At 0.5-1%, the same losing streak barely dents your drawdown budget — which is exactly why the sub-6% self-imposed limit from a 10% rule exists: it's not conservatism for its own sake, it's room for the loss streaks the probabilities say will happen.

The recovery math nobody prices in

A −10% max DD doesn't need +10% to recover — it needs +11.1%, because the gain compounds off a smaller base. That gap between the loss percentage and the required recovery percentage is called the drawdown recovery percentage, and it's the single most underpriced number in prop trading. Most traders eyeball a −20% hole and think "I need +20% back." You don't. You need +25%. The deeper the hole, the uglier the gap gets.

Required gain after −5%, −10%, −20%, −33% and −50%

The formula is simple: Recovery % = Loss % ÷ (1 − Loss %). Run it across the drawdown levels you'll actually see on a funded account and the curve stops being academic:

Notice the slope isn't linear — it's convex. Between −5% and −10% the required recovery roughly doubles, but between −33% and −50% it nearly doubles again off a much bigger base. This is why recovery factor (net gain divided by max DD) is one of the first metrics evaluators and funded traders alike should track — a strategy with a recovery factor under 1 is, by definition, still underwater on its own worst drawdown.

Why the recovery curve turns revenge sizing into a death spiral

Here's where the arithmetic meets psychology. The deeper you go, the stronger the pull to double your position size to "get it back faster" — that's revenge trading dressed up as a plan. But the math works against you exactly when you need it most: if you double risk per trade after a drawdown, the next loss doesn't just hurt twice as much, it roughly doubles the recovery percentage you now need, because you're compounding a bigger loss off an already-shrunk base. Size up into a hole and you're not climbing out faster — you're steepening the same curve that just beat you.

The counter-move used by traders who actually pass evaluations is the opposite instinct: cut position sizing after a drawdown, not increase it. A common rule is to halve size once you hit −4% and only restore full size after printing a new high-water mark — the highest equity point your account has ever reached. That one rule flattens the recovery curve instead of steepening it, because you're protecting the base you'll need to compound from.

One more wrinkle: if you're trading a trailing-drawdown account, the recovery math above is actually optimistic. A trailing floor ratchets up with every new high, so the cushion you just earned doesn't stay put — it moves with you, which means a drawdown taken right after a strong run eats into room you thought you still had. Know which type your account uses before you size a single trade off this table.

Drawdown discipline on an evaluation vs a funded account

The max DD rule you respect changes the moment you pass — not the number, the behavior around it. On a Two-Step Challenge, a clean 6% realized drawdown with a hit target beats a messy 9.5% curve that technically cleared, because evaluators (and your own future risk habits) read the shape of the equity curve, not just the pass/fail line. On a funded account, the same breach doesn't end an attempt — it ends the account and the performance rewards schedule attached to it. That asymmetry is why most consistent traders tighten their personal max DD ceiling after passing, not loosen it just because the account balance is bigger.

What changes after you pass

During the evaluation, your only job is to clear the profit target without touching the drawdown limit — a single attempt, a single curve. On a funded account drawdown works the same mathematically, but the cost of a breach is now recurring income, not a one-time challenge fee. Traders who treat funded capital like challenge capital — sizing up because "it's not my money" — are the ones who blow through a trailing floor in week one. Instant Funding accounts skip the evaluation step entirely, but the drawdown math and the stakes of a breach are identical once capital is live.

How trailing drawdown behaves after the first payout

Here's where traders get caught off guard. On most trailing-drawdown models, a withdrawal reduces your equity but does not reset the trailing floor — the floor keeps tracking your highest closed balance before the payout, not after. Take a $20,000 profit payout on a $130,000 peak balance and your equity drops to $110,000, but the floor may still be anchored near the $130,000 high-water mark depending on how your account treats the post-payout reset. That gap quietly shrinks the room you thought you had. Before your first withdrawal, confirm whether your account anchors the floor at the initial balance plus profit target once that level is cleared — some models switch to a static floor at that point, others don't. One email to support before the first payout saves you from finding out the hard way mid-trade.

Why XAUUSD and US100 positions swing further than your balance suggests

Closed balance and floating equity are not the same number, and the gap is widest on the instruments traders love most. XAUUSD volatility routinely exceeds its own daily ATR inside the London–New York overlap — a $30-40 handle swing in minutes isn't rare, it's Tuesday. US100 (NSDQ) gaps hard around CPI prints and earnings weeks, sometimes 100+ points before you can react. On a $100,000 account, that means floating equity can sit several hundred to several thousand dollars below your last closed balance while a position is open — drawdown you're carrying but haven't realized yet. Check which drawdown model your account uses — static or trailing, closed-equity or floating-equity based — before you place your first trade on either instrument. The model determines whether that unrealized swing counts against your limit in real time or only once you close.

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