What the consistency rule actually measures
Some prop firms apply a consistency rule: a check that your total profit isn't concentrated in one lucky day. This calculator uses your best single day's profit divided by net total profit, multiplied by 100. Say your best day made $400 out of $1,000 total profit: $400 ÷ $1,000 × 100 = 40%. If the entered threshold sits at 30%, that 40% is above the line. The threshold, profit definition and whether a rule applies differ by firm and can change. A rule using only profitable days in its denominator needs a different model; check your account's current definition before using these results.
Why the best-day share can exceed 100%
Losing days reduce net total profit without reducing your best day. If the best day is $1,800 and losses bring total profit down to $1,000, the ratio is 180%, not an invalid input. At an illustrative 50% threshold, that unchanged best day requires $3,600 total profit: a $2,600 gap from the current total. A zero or negative total has no meaningful positive-profit share in this model, so the calculator requires a positive total.
What the additional-profit estimate assumes
With the best day held constant, the gap is max(0, best day × 100 ÷ threshold − total profit). A $400 best day and an illustrative 30% threshold require total profit of $1,333.333… for that same best day to represent exactly 30%. From $1,000 total profit, the difference is approximately $333.33. The displayed currency rounds to cents; rounding and an account's comparison rule can matter at the boundary. A new best day changes both the numerator and total, so the old gap no longer applies: enter both updated values. This is a conditional arithmetic estimate, not a reason to take additional trades or a prediction of earning that amount.
No firm names, editable threshold
The 30% default is a teaching example, not a verified firm preset. Enter your account's current threshold and calculate the best day and total over its specified measurement window. A result at or below that threshold checks only this ratio: it does not verify payout eligibility, other account rules, fees or whether the firm accepts your definition of profit. Copy calculation saves your inputs, result and assumptions to your clipboard for your own notes. The linked prop-rules dashboard uses manual account inputs for chart-based monitoring; it does not automatically read your broker's trades or enforce account limits.