Consistency rule calculator for prop payouts
What share of your profit came from your single best day, and whether that passes your firm's consistency rule. Failing it can void an otherwise passed challenge.
Best-day share
45.3%
Over the limit.
Largest allowable best day$2560.00
Extra profit needed to comply$850.00
Track this challenge →
Tracks each day's contribution as trades close.
What this covers
The common form: best day as a percentage of total profit.
Some firms measure against average daily profit, or apply it only at payout. Check your agreement.
Uses figures you enter. It does not read your account.
Formula and assumptions
Best-day share = best day's profit ÷ total profit.
Compliant when that share is at or below the limit.
Extra profit needed = best day ÷ limit − current total.
Largest allowable best day = total profit × limit.
Assumes profit is measured on closed trades, as most firms do.
consistency.v1
Worked example
Example — check your own firm's rules.
Total profit$6,400
Best single day$2,900
Limit40%
Best-day share45.3%
StatusOver the limit
Extra profit needed$850
Common mistakes
Discovering the rule at payout instead of at the start.
Chasing one large day to finish quickly, which is exactly what the rule penalises.
Assuming a losing day reduces the best day's share — it usually lowers total profit and makes it worse.
Reading the limit as applying per phase when the firm applies it to the whole account.
Limitations
This is arithmetic on numbers you supplied. It does not know your broker, your account, or the market. It does not predict price, does not say whether to take a trade, and is not advice. Maximelion is not affiliated with any broker or prop firm, and nothing here is endorsed by one.
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Last reviewed 25 July 2026