Prop firms·9 min read
Prop-firm challenge rules, explained the way they are measured
Most traders who fail a prop-firm challenge do not fail because their strategy was bad. They fail because of a rule they understood approximately: a daily loss measured on equity rather than closed trades, a drawdown that trails their high-water mark, a trading day that reset at the firm's midnight rather than theirs. This guide explains each rule as firms actually apply it, without naming any firm's current numbers — those change, and you should read your own agreement.
Published 9 September 2026 · by the SageTradingJournal team
Rule 1 — the daily loss limit
The daily loss limit is a percentage of the starting balance — commonly around 4% to 5% — that your account may not lose within one trading day. Two details decide challenges. First, most firms measure it on equity, which includes the floating loss of open positions: a trade that is −3% open with a −2% closed day already has you at the limit even though nothing further has closed. Second, the day is the firm's server day, often midnight in a Central European timezone. If you trade New York afternoons, your "today" straddles two of their days.
Rule 2 — maximum loss, static or trailing
The maximum loss (or maximum drawdown) is the total the account may be down before the challenge ends — typically 8% to 12%. The word that matters is from where. A static limit is measured from the starting balance: on a $100,000 account with a 10% limit, the floor is $90,000, full stop. A trailing limit is measured from the highest balance (sometimes highest equity) you have reached: make $6,000 and the floor rises to $96,000. Trailing rules mean that a good start can be given back and still end the challenge — you are protecting your profits from yourself, whether you want to or not.
| Static | Trailing | |
|---|---|---|
| Measured from | Starting balance | Highest balance (or equity) reached |
| Floor after +6% on $100k, 10% limit | $90,000 | $96,000 |
| A drawdown from the peak that fails | 16% | 10% |
| Typical of | Evaluation phases at many firms | Some evaluations; many funded accounts |
Some firms use a trailing limit that stops trailing once you are a certain amount in profit; some trail on closed balance only. This is the rule most worth reading twice in your agreement, because getting it wrong flatters a losing account. The prop-firm drawdown calculator lets you set static or trailing and see the floor for your situation.
Rule 3 — the profit target
The target is a percentage gain — often 8–10% in a first phase, 5% in a second — that completes the evaluation. It is the rule traders focus on and the one that causes the least trouble on its own. It causes trouble in combination: a trader far from target with few days left increases size, and the daily-loss rule ends the attempt. The target is a destination; the loss limits are the road, and the road is where accounts die.
Rule 4 — minimum trading days
Many firms require a minimum number of days on which at least one trade was placed — commonly four to ten — before a pass counts. The purpose is to stop a challenge being passed with one lucky day. A day counts if a position was opened on it under the firm's clock. Some firms also apply a consistency rule: no single day may account for more than some fraction of total profit. Read for it; it is easy to miss and it invalidates exactly the kind of day that feels like a triumph.
Other rules that end challenges
- Holding over the weekend or through major news, where prohibited.
- Maximum lot sizes or a maximum risk per trade, on some programmes.
- Time limits on the evaluation (though many firms have removed them).
- Copy trading, hedging between accounts, or "gambling" behaviour as the firm defines it.
- Inactivity: accounts closed after a set number of days without a trade.
How to trade inside the rules
- 1Set up the rules exactly as written — daily %, max %, static or trailing, target, minimum days, and the firm's day offset from UTC — before the first trade.
- 2Know your distance to each limit before every trade, in money. Not "I think I'm down about 2%" — the number.
- 3Size so that a normal losing day cannot reach the daily limit. If four losers is a bad-but-normal day for you, four times your risk must sit well under the daily loss (position sizing).
- 4Stop trading for the day at a personal limit well inside the firm's. The firm's limit is a wall; yours should be a fence a good way in front of it.
- 5Journal every attempt, passed or failed, with the cause. Two failed attempts for the same reason is a pattern, and patterns are fixable.
What failed attempts teach
A failed challenge is data. The cause — a daily-loss breach on day three, a trailing drawdown hit after a strong start, a consistency rule tripped by one big day — points at a specific habit. Keep every attempt: its rules, its trades, its end. Across three or four attempts the pattern is usually obvious, and it is usually behavioural rather than strategic: size after losses, trading outside the plan's session, one more trade after the personal stop. The strategy that passes is often the same one that failed, traded inside a fence.