Prop firm consistency rule calculator
Does your best day fit the consistency rule? Enter your numbers, see the share and the profit you would still need. No sign-up.
Enter your total profit, the profit of your best single day and the largest share of the total that one day may make up. You see the share your best day really is, whether it is inside the limit, the biggest best day your total allows and how much more profit you would need for the day you already had to fit. The starting numbers are invented: $2,000 total, a $700 best day and a 30% limit.
What a consistency rule is checking
Some prop firms add a consistency rule to their payout or funding conditions. The aim is simple: they want to see steady results rather than one lucky day carrying the whole account. The most common way to express it is a cap on how much of your total profit one day may supply. If the limit is 30% and your total profit is $2,000, no single day may be worth more than $600. This page does that division for you and also runs it backwards.
Firms describe the rule in different words and the details are not the same everywhere. Some measure the best day, some the best single trade, some compare against total profit and some against the profit target. Some have no such rule at all. Treat the percentage you type here as an example until you have read your own firm's rules, because the number in the box is only as right as the rule you copied into it.
The two formulas
Best day share = best day profit divided by total profit, times 100. If the share is at or below the limit, the day fits.
Total profit needed = best day profit divided by the limit as a decimal. For a $700 best day and a 30% limit that is 700 / 0.30 = $2,333.33. Subtract the profit you already have to see how much more the account must make while the best day stays the same.
| Total profit | Best day | Share | Limit 30% | Extra profit needed |
|---|---|---|---|---|
| $2,000 | $500 | 25.0% | Within | $0.00 |
| $2,000 | $600 | 30.0% | Exactly at the limit | $0.00 |
| $2,000 | $700 | 35.0% | Over | $333.33 |
| $3,000 | $700 | 23.3% | Within | $0.00 |
| $1,000 | $450 | 45.0% | Over | $500.00 |
Every row is computed from the formulas above. The numbers are hypothetical and do not describe any real account or any firm.
Reading the result
If the status says over the limit, the last box tells you the total at which your current best day would fit. That is a useful planning figure, but it has a catch: it assumes the extra profit arrives without creating a new best day. If one more strong day beats the old record, the best day itself grows, and the target total moves up with it. The safest way to close the gap is a run of ordinary days, not one large one.
If the status says within the limit, remember that the share can change when you take losses. A losing day lowers the total and makes the same best day a larger share. A trader who sits at 28% against a 30% limit can be pushed over it by a single bad afternoon.
Where the numbers come from in your own account
You need two figures: the total profit over the period your firm counts, and the profit on your best day. The History tab of MetaTrader 5 shows closed deals, and you can add up a day by hand. A journal that already groups results by day makes it faster. AI Trading Journal reads your closed trades from MetaTrader 5 and shows each day as a coloured tile in its P&L calendar with the result and the trade count, plus weekly totals and a month summary. Read the best tile and the month total from there and type them in. The app does not know your firm's rules and does not calculate the consistency rule itself, so this page does that part. For the losing side of the picture see the prop firm drawdown calculator and the daily loss limit calculator.
A reminder about days and clocks
A trading day depends on the clock. MetaTrader 5 stamps deals in the broker's server time, and a firm may count days by its own clock, so a trade near midnight can fall on a different day in your figures than in theirs. If your best day is close to the limit, check how your firm defines a day, and read MT5 server time explained to see how the server clock works.
A week checked day by day (hypothetical)
A trader makes +$120 on Monday, +$80 on Tuesday, -$60 on Wednesday, +$450 on Thursday and +$90 on Friday. The total is $680 and the best day is Thursday at $450. Against a 30% limit the share is 450 / 680 = 66.2%, far over. The largest best day this total allows is 680 x 0.30 = $204, and a $450 day would fit only once the total reached 450 / 0.30 = $1,500. That does not mean the week was bad. It shows how a rule of this kind treats a short period: with only a few days of results, almost any good day is a large share, so the figure is far more meaningful after a longer run. Check which period your firm measures over before you worry about a single week.
Common mistakes when checking the rule
- Using the wrong total. Whether the total is net or gross, and whether it includes open trades, depends on the firm. Ask or read the rules.
- Mixing clocks. A trade near midnight can sit on a different day in your journal than in the firm's records.
- Checking once, at the end. The share changes with every day, and some firms check it at each payout request.
- Copying a percentage from a video or forum. Rules change and differ by account type. Use your firm's current page.
- Forgetting that losses count. A losing day lowers the total, so the same best day becomes a larger share.
Limits of this calculator
- It checks one common form of the rule, the best day against total profit. It does not check best-trade rules, minimum trading days, or rules measured against the profit target.
- It cannot know your firm's real percentage or how it counts days. You must copy those from your firm's own rules.
- It does not include fees, commissions or payouts that a firm may count differently.
- It is arithmetic, not trading advice, and passing a rule check does not mean a payout is approved.
Frequently asked questions
What is the prop firm consistency rule?
How do I calculate the consistency rule?
What percentage is the consistency rule?
How much more profit do I need to meet the rule?
Does the journal app check the rule for me?
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