Prop Firm Drawdown Explained: Static vs Trailing Drawdown (With Examples)

"Ten percent maximum drawdown" is printed on almost every prop-firm product page, and almost every trader reads it the same way: I can lose $10,000 of a $100,000 account before I fail. Whether that is true depends on one word the page usually puts in smaller type — static or trailing — and on a second, smaller word that decides how the trailing kind is measured. Two accounts with the same "10%" can give you a $10,000 cushion in one case and a $1,000 cushion in the other, on the same week of trades.

This guide walks one week of trading through the three rule shapes prop firms actually use — a fixed floor, a floor that trails your end-of-day balance, and a floor that trails your intraday equity peak — and shows the exact dollar room each one leaves after every session. The figures come from a small script, not from a firm's marketing table, so you can change the numbers and rerun them for your own account. The examples use round figures; the rule geometry is what to take away, and every firm publishes its own exact version.

Short version: a static drawdown measures how much you can lose; a trailing drawdown measures how much you can give back. The moment the account goes up, a trailing floor follows it, and a good week can leave you with less room than you started with. Trade the rule you actually have, not the headline percentage.

The three shapesWhat "10% max drawdown" can mean

Every drawdown rule is a floor: a balance below which the account is closed. The rules differ only in where that floor sits and whether it moves.

Trailing rules then split again on which high-water mark they watch:

• End-of-day (EOD) trailing. The floor is recomputed once a day from the closing balance. Open profit during the session does not move it. FTMO's 1-Step product and several futures firms use this shape; our FTMO rules guide works through its exact version.
• Intraday (real-time) trailing. The floor follows the highest equity the account ever reached, including unrealised profit on an open position, tick by tick. Take a trade to +$3,000 open, watch it come back to +$500 and close it, and the floor moved up $3,000 for a trade that banked $500. Topstep's Trading Combine is the best-known example; our Topstep guide covers its consistency rules alongside it.

Many trailing rules add one relief: the floor locks once it reaches the starting balance — that is, once the account is up by the full limit, you can never again fail by falling below your initial capital. The examples below note where that would kick in.

One week, three floorsThe same trades, very different room

Take a $100,000 account, a $10,000 maximum-loss limit and a $5,000 daily-loss limit, and this week. Each day has an intraday equity peak (the best the account looked at any moment) and a closing balance.

Read the last row. The account finished the week at $97,500 — down $2,500 from where it started, a perfectly ordinary week. Under the static rule it still has $7,500 of room. Under EOD trailing it has $3,500. Under intraday trailing it has $1,000, because Tuesday's equity peak of $106,500 pinned the floor at $96,500 and nothing that happened afterwards can lower it.

Two details in the table are worth a second look. Tuesday's intraday peak was $2,500 above Tuesday's close: the difference between the EOD and intraday floors for the rest of the week is exactly that $2,500 of open profit that was never banked. And under EOD trailing, Wednesday's floor became $94,000 only because Tuesday closed at $104,000 — a strong close raises tomorrow's floor even when the next morning gives it all back.

Why a good day costs youTrailing drawdown measured in losers

The practical unit of drawdown is not dollars; it is how many consecutive losing trades the account can absorb before the floor. Divide the room by what you risk per trade.

That is the whole argument for sizing to the rule rather than to the account. A 1% risk per trade sounds conservative; on the Friday account it means one loss ends the evaluation. Our position sizing guide works from the account; under a trailing rule you work from the room, and the room changes every day.

Daily loss and maximum lossWhich line binds today

Most firms run two limits at once: the maximum-loss floor above and a daily loss limit measured from the day's opening balance (or, on some rules, from the day's opening equity). On any given day, the line that stops you is whichever is higher.

Thursday in the example: the day opened at Wednesday's close of $101,500, so the daily line sits at $96,500. The EOD trailing floor is $94,000. The binding line on Thursday is therefore $96,500 — the daily limit, not the drawdown — and Thursday's close of $99,000 was $2,500 above it. Under the intraday rule the two lines happen to coincide at $96,500 that day, which is a coincidence of the example, not a rule.

Three habits follow from that:

1. 01Write down both lines before the open. Yesterday's close minus the daily limit, and today's drawdown floor. The higher number is your stop for the day.
2. 02Recompute the trailing floor after every new peak, not after every trade. A trade that closed for +$500 after showing +$3,000 moved an intraday floor by $3,000.
3. 03Treat the floor as the account size. If the room is $3,500, you are trading a $3,500 account today, whatever the balance says.

Which rule is better for youA decision, not a preference

Neither shape is "fair" or "unfair"; they price a different thing. A static rule sells you a fixed amount of loss. A trailing rule sells you a cheaper evaluation with a tighter leash — the firm's risk is capped at the limit only until you are up, after which your own profits become the buffer.

The same question, put as arithmetic: ask what the room will be after your typical good week, not after a bad one. Under a static rule the answer is "more than I started with". Under a trail it can be "less" — and if that answer would change how you trade, you know which product to buy.

Track the floor, not the balanceWhat to log every session

A journal that records only balance and P&L cannot show you the number that actually ends a prop account. Four fields fix that, and they take a minute a day:

• Opening balance and today's daily-loss line. Yesterday's close minus the daily limit.
• Today's drawdown floor. For a static rule, a constant. For a trail, yesterday's high-water mark minus the limit — updated during the day under an intraday rule whenever a new peak prints.
• Room at the close, in dollars and in losers at your current risk. When that second number falls below three, size down before the next session, not after it.
• Peak-to-close give-back on every trade — the amount of open profit surrendered. It is the invisible cost under an intraday trail, and the habit that most reliably shrinks it is a planned partial exit at the first target.

The CalculatorAI Trading Journal keeps a P&L curve per account and a per-trade record where those numbers live; a rules-based journal is what turns a firm's fine print into a daily stop you can actually see. For the sizing arithmetic itself — how much to risk so that a run of ordinary losers fits inside today's room — the risk/reward calculator does the division for you, and the drawdown guide explains how to tell a normal losing streak from a broken edge.

Frequently asked questions

What is the difference between static and trailing drawdown? A static drawdown is a fixed floor: starting balance minus the limit, and it never moves. A trailing drawdown is a floor that rises with the account's high-water mark — the limit is measured from the highest balance (or equity) reached, so profits raise the floor and it never falls back.

What is the difference between end-of-day and intraday trailing drawdown? End-of-day trailing recomputes the floor once a day from the closing balance, so open profit during the session does not move it. Intraday trailing follows the highest equity the account ever reached in real time, including unrealised profit on open positions, so a winner that comes back to break-even still raises the floor.

Does a trailing drawdown ever stop moving? On many rules, yes: once the account is up by the full limit, the floor locks at the starting balance and behaves like a static rule from then on. Check whether your firm's rule locks, and at what level — it is one of the most valuable clauses in the contract.

Is a trailing drawdown calculated on balance or equity? It depends on the firm. Balance-based trails use closed P&L; equity-based trails include open positions. An equity-based intraday trail is the strictest shape, because the floor follows the best moment of every open trade.

Which drawdown type is better for passing a prop firm challenge? Static, if you can choose it, because the room you start with is the room you keep. Under a trailing rule the practical fix is to size trades from today's remaining room rather than from the account size, and to bank at least part of every winner so that open profit is not surrendered to the floor.

How do I calculate how much room I have left? Room = current balance − today's floor. For a static rule the floor is start − limit; for a trailing rule it is the highest mark the rule watches − limit. Divide the room by your risk per trade to get the number of consecutive losses the account can still take.

Sources and methodology

• All dollar figures in the tables were produced by drafts/prop-firm-drawdown-numbers.mjs, which models three generic rule shapes — a static floor, an end-of-day trailing floor and an intraday (equity-peak) trailing floor — on a $100,000 account with a $10,000 maximum-loss limit and a $5,000 daily-loss limit over one hypothetical week. Rerun it with your own numbers.
• The rule shapes are generic descriptions of how proprietary-trading evaluations define maximum loss. Individual firms differ in whether the mark is balance or equity, whether it is end-of-day or real-time, whether fees count, and where (or whether) the floor locks; the firm's own rules page is the only authoritative source for a specific account, and our guides to FTMO's rules and Topstep's Trading Combine cover two published implementations in detail.
• "Losers before the floor" is the floor room divided by a fixed risk per trade, rounded down; it ignores commissions, slippage and partial losses, all of which make the real number smaller.
• No firm's prices, pass rates or payouts are asserted in this article.