Prop Consistency Rule Checker
Enter your daily results and the limit to see your best day's share of profit, whether it passes, and how much more total profit you need. A $3,000 best day under a 30% rule needs $10,000.
- Result
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- Total net profit
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- Best day
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- Profit needed for the best day to fit
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- Still needed
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- Biggest single day you can add and still pass
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- Days entered
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Your days (best day highlighted)
| Day | Net P&L | Share of profit | Running total |
|---|
What a consistency rule checks
Some prop firms add a consistency rule on top of their loss limits: no single day may make more than a set share of your profit, often somewhere between 30% and 50%. Some firms check it in the evaluation, some only before a payout, and some do not use one at all. This checker takes your daily results and returns your best day's share, whether it passes, and exactly how much more total profit you need before the best day falls under the limit.
How to use it
- Enter the limit from your rules, for example 30%.
- Choose what the best day is compared with: total net profit (losing days count against you) or profitable days only. Your terms say which.
- Type one net result per trading day, using a minus sign for losing days, or paste a column from a spreadsheet or your platform's report and press the replace button. Dollar signs, thousands commas and text such as dates are ignored.
- Read the result, the profit still needed and the biggest day you can add without breaking the rule.
The formulas
- Best day share = best day ÷ total net profit (or ÷ the sum of profitable days)
- Pass when the share is at or below the limit
- Profit needed = best day ÷ limit; still needed = that minus what you have
- Biggest day you can add and still pass (when you pass now) = limit × profit ÷ (1 − limit)
Any new day bigger than your current best day becomes the new best day and raises the profit needed again. Under the total-net-profit version, a losing day lowers the total and pushes the share up.
Worked examples
Example 1: one big news day. Five days: +$600, +$400, +$3,000, −$300 and +$500. Total = $4,200, best day $3,000. Share = 3,000 ÷ 4,200 = 71%, so a 30% rule fails. Profit needed = 3,000 ÷ 0.30 = $10,000, which is $5,800 more, with no new day above $3,000. If one more day made $3,500, the requirement would become 3,500 ÷ 0.30 = $11,667.
Example 2: the same days under other rules. At a 40% limit the profit needed is 3,000 ÷ 0.40 = $7,500 ($3,300 more); at 50% it is $6,000 ($1,800 more). If the rule counts profitable days only, the base is $4,500 instead of $4,200, the share is 66.7% and a 30% rule still needs $10,000 of profitable days, $5,500 more.
Example 3: an even month that passes. Seven days: +$800, +$1,200, −$400, +$900, +$1,100, +$700 and +$1,000. Total = $5,300, best day $1,200, share = 22.6%: a pass under 30%. The biggest day you could add and still pass is 0.30 × 5,300 ÷ 0.70 = $2,271.43.
Common mistakes
- One oversized trade around news. A full lot through a fast gold hour can make a single day that dominates the month.
- Counting the day wrongly. Firms use their own server day; a trade closed after the reset usually counts on the closing day.
- Forgetting that losses count. Under the total-net-profit version, a red day raises your best day's share.
- Chasing the requirement with bigger size. A bigger day moves the target up again. A steady daily cap, set below best day ÷ limit, works better.
Learn more
Read the prop firm consistency rule explained, check your daily and max-loss room with the prop drawdown tracker, and plan risk per trade with the prop challenge calculator. A trade journal makes the daily totals easy to copy.
Hypothetical examples only. We do not recommend any prop firm or evaluation, and this tool names none.
Frequently asked questions
How is a prop firm consistency rule calculated?
The usual form divides your best day’s profit by your total net profit for the period. If the result is at or below the limit, for example 30%, you pass. Some firms divide by profitable days only, or compare the best day with the profit target instead.
How much profit do I need to pass a consistency rule?
Divide your best day by the limit. A $3,000 best day under a 30% rule needs $10,000 of total profit; under 40% it needs $7,500 and under 50% $6,000.
Do losing days count in the consistency rule?
Under the total-net-profit version, yes: a losing day lowers the total, so the best day becomes a bigger share. Under a profitable-days-only version, losing days are left out of the calculation.
What happens if my next day beats my best day?
It becomes the new best day, and the profit needed rises to the new best day divided by the limit. That is why a steady daily profit cap is the usual way to handle the rule.
Can I paste my results from a spreadsheet?
Yes. Paste a column of daily results into the paste box and press the replace button. Values can be separated by new lines, spaces or semicolons; dollar signs and thousands commas are removed, and text such as dates is ignored.
Does every prop firm have a consistency rule?
No. Some use one in the evaluation, some only before payouts, some use a lot-size version instead, and some have none. Read your own terms and enter the limit they state.
Educational tool only. Not financial advice and not a signal. Check your own broker's contract specification, margin rules and costs. Past data does not predict future prices. See our risk disclaimer.