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. The math behind it is simple — consistency % equals your best single day's profit divided by total profit, multiplied by 100. Say your best day made $400 out of $1,000 total profit: $400 ÷ $1,000 × 100 = 40%. If the firm's threshold sits at 30%, that 40% is above the line. The formula itself never changes; only the threshold does, because the exact percentage — and even whether the rule applies at all — differs by firm and changes over time.
How to trade out of a failing number
When your number sits above the threshold, the honest fix is more total profit — without a bigger best day. The gap works out to (best day × 100 ÷ threshold) − total profit. With a $400 best day and a 30% threshold, you'd need total profit of $400 × 100 ÷ 30 ≈ $1,333 to bring that same best day back down to exactly 30% — about $333 more than the $1,000 already banked. Trading a new, bigger best day defeats the purpose: it raises the numerator right along with the total, so the ratio barely moves. The percentage only improves when the extra profit comes from other, smaller days that dilute the existing best day's share.
No firm names, editable threshold
This calculator doesn't name a specific prop firm and doesn't claim to predict whether any account will be approved. Consistency-rule thresholds, measurement windows, and even whether the rule exists at all differ by firm and change without notice — a number pinned to one firm today can be stale next quarter. That's why the threshold field defaults to 30%, a common figure, but stays fully editable: type in your own firm's current terms and every output updates instantly. For a running view of these buffers against your actual trades rather than typed-in numbers, see the prop-rules dashboard linked below.