Consistency Rule Calculator

How the consistency rule is calculated

Best-day share = best day ÷ total net profit. The total the rule requires is the best day divided by the limit, or the profit target if that is larger. Then:

Profit still needed = total the rule requires − total net profit

Worked example: four days with a 40% limit

The calculator starts with four hypothetical days of net P&L in USD from the consistency rule guide: +600, +1,500, −400, and +700, with a 40% limit and no profit target.

1. Total net profit: 600 + 1,500 − 400 + 700 = 2,400 USD. Best day: 1,500 USD. Share: 1,500 ÷ 2,400 = 62.5%, over the limit.
2. Total the rule requires: 1,500 ÷ 0.40 = 3,750 USD. Profit still needed: 3,750 − 2,400 = 1,350 USD.
3. Next-day range: from 1,350 USD to 0.40 × 2,400 ÷ 0.60 = 1,600 USD. A 1,600 USD day would become the new best day at exactly 40% of a 4,000 USD total.
4. After only the first two days, 1,650 USD was still needed, but the largest next day was 0.40 × 2,100 ÷ 0.60 = 1,400 USD. No single day could fix the share.

Two ways firms apply the limit

As of 20 October 2026, Topstep's consistency page describes both. In the Trading Combine, a best day above 55% of total profit raises the profit target to best day ÷ 0.55: a 1,800 USD best day raises a 3,000 USD target to 3,273 USD. On the Consistency path of the Express Funded Account, the largest day must be 40% of total net profit or less for payout eligibility, and the calculation resets after a payout request. Enter a profit target for the first kind of rule and leave it empty for the second.

What the calculator leaves out

The calculator takes the days as you enter them. It does not know your firm's trading-day cutoff, whether open positions count, or when the count resets, so group your trades into days the way your firm does and start from the last reset. The next-day range tells you which results would meet the rule. It is not a target to trade for, and it does not tell you what size to take.

In Tradeways, a goal can hold a Consistency constraint that calculates the same share from the net P&L of your closed trades, grouped by calendar day in your Tradeways timezone. Prop-firm templates create it with the firm's percentage. The goal shows At risk once the share reaches 75% of the limit, a Tradeways setting rather than a firm rule, and Breached above the limit. It does not raise a profit target, so use this calculator for the total the rule requires.