Prop Firm Consistency Rule Calculator

Futures and forex prop firms use the consistency rule to filter out traders whose results come from one lucky outsized day rather than a repeatable process. The rule states that your best single day may not exceed a fixed percentage of your total profit. Whether it applies during the evaluation, to payout eligibility, or both — and at what threshold — is defined in each firm's terms, so this calculator takes the rule as an input. The compliance math is a single division:

required total profit = best day ÷ rule

Worked example with the defaults: a $1,200 best day under a 30% rule requires $1,200 ÷ 0.30 = $4,000 of total profit. Sitting at $2,500, you need $1,500 more — earned on other days — before that best day stops blocking you. Note the asymmetry: you cannot fix a consistency breach by trading less; only additional profit dilutes the outlier day.

The rule has a hard combinatorial floor: if no day may exceed X% of the total, you need at least ⌈1 / X⌉ profitable days — a 30% rule implies at least 4, a 20% rule at least 5. With your current inputs the minimum is 4 days. The practical consequence: daily profit targets should be sized as a fraction of your overall goal from day one, because a single day at half the target total forces you to grind the remainder in small pieces. Consistent daily sizing is also what the survival math prefers — the losing streak calculator shows why oversized days cut both ways, and the payout calculator translates a compliant month into actual take-home income.