The Prop Firm Consistency Rule
A consistency rule is a prop firm condition that limits how large your best single day may be compared with your other profit. Firms divide that day by different totals, so one trading record can meet one firm's rule and fail another's without a single trade changing.
A consistency rule is the one prop firm condition that can be broken by making money. It does not limit a loss. It limits how much of your result one day may carry, and it exists because a firm is trying to pay for repeatable trading rather than one lucky session.
How it works
Every version is a fraction: best day on top, some total underneath. The rule states a maximum for that fraction. What changes from firm to firm is the total underneath, and that single choice decides how a record is judged.
Three published versions, read on 25 Sep 2026:
FTMO, 1-Step challenge. The best day may not be more than 50% of the profit from all positive days, per FTMO’s trading objectives. Losing days are not in the denominator. FTMO states that failing the ratio is not a breach; you keep trading until it is met.
Topstep, Trading Combine. The best single day must stay at or below 55% of the profit target. If it goes over, the required profit becomes best day divided by 0.55, per Topstep’s consistency article. The denominator is a fixed number, not your results.
Topstep, Express Funded Account payouts. The largest single-day net profit divided by total net profit must be 40% or below to be payout eligible. Here losing days do reduce the denominator, because it is net.
No rounding and no buffer. Topstep says so directly: the thresholds are fixed lines.
A worked example
Take one hypothetical five-day record: +$2,400, +$600, −$500, +$800, +$1,200. The best day is $2,400 every time; only the denominator changes.
Under FTMO’s positive-days version, the positive days add to $5,000 — the −$500 day is left out. The best day is $2,400 / $5,000 = 48.0%. The line is 50%, so the record meets it.
Under Topstep’s payout version, total net profit is $4,500, because the losing day counts. The best day is $2,400 / $4,500 = 53.3%. The line is 40%, so the account is not yet payout eligible.
Under Topstep’s Combine version, suppose the account is a $50K Combine with a profit target of $3,000. The best day is $2,400 / $3,000 = 80.0%, well over 55%. It is not a failure; the required profit rises to $2,400 / 0.55 = $4,364.
What the big day costs
The useful question is not whether the rule is met but how much more profit it now demands. Rearrange each rule: the total you need is the best day divided by the limit.
For the payout rule: $2,400 / 0.40 = $6,000 of net profit. The record has $4,500, so it needs another $1,500 — and none of the extra days may beat $2,400, or the requirement grows again.
For the Combine: $2,400 / 0.55 = $4,364, which is $1,364 more than the $3,000 originally asked.
For FTMO’s rule the record is already fine at 48.0%, but only just. One more losing day does not change it, since losing days are outside that denominator; a sixth positive day of any size moves it further from the line.
That is the practical asymmetry. A net-profit denominator punishes a losing day twice: once as a loss, and again by shrinking the total the best day is measured against.
Why firms use it
It separates a record from a single outcome. A result built on one very large day says little about the next month, and a firm paying out on simulated profit has a reason to prefer a steadier curve.
It also shapes position size. The easiest way to produce one outsized day is to trade larger than usual, and that is the behavior every loss limit on a prop firm challenge already punishes. A fixed risk per trade tends to keep days of similar size, which is what the ratio rewards.
The original data
16 of the 24,971 videos in the search study behind this site put consistency rule in the title, at a median of 9,172 views across 15 channels. Every one of the 16 stays under 50,000 views; the largest has 49,464. 11 of the 16 titles are instruction-shaped, promising to explain or beat the rule.
The median of those videos runs 7.3 minutes, and the arithmetic above takes three divisions. Before paying for any evaluation, the one thing worth writing down is which total your firm divides by.
When it fails
The first failure is assuming every firm means the same rule. The worked record passes FTMO’s version at 48.0% and fails Topstep’s payout version at 53.3%, with no trade changing between them. A trader who learned one rulebook and moved to another can be ineligible on a record that looked fine.
The second is chasing the ratio by trading more. The fix for a high ratio is more ordinary days, but extra days under pressure are where revenge trades and oversized entries come from, and those create the next outsized day or the next breach.
The third is forgetting that losses count under a net rule. Under a net-profit denominator a losing day raises your ratio even though your best day did not change.
The fourth is treating a raised Combine requirement as harmless. It is not a breach, but every extra day is spent under a loss limit that may already have trailed upward.
And the fifth is not checking before the request. The ratio takes seconds to compute; learning it from a declined payout takes a cycle.
Related
Funded account covers the stage where payout rules like this apply. Prop firm challenge shows how loss limits and position size interact. And risk per trade is the setting that keeps day sizes similar in the first place.
Find the denominator before anything else. Positive days, net profit and the target are three different numbers, and the one your firm uses decides whether a big day helps or costs you.
— Michael Whitman
This page is educational, not financial advice. Test every idea on your own charts before risking money.