At your normal size it barely affects you: in our simulations, the same trader passed 61.3% with and without a consistency rule. It stops people trying to pass in a few days with big size: at 4× their size, pass rates fell from 38.6% to 25.9% with a 40% rule, and it took 7 sessions instead of 3.
What the rule says
Your best day can't be more than a percentage of the evaluation's total profit. If it is, you don't lose the account: you keep trading until the other days make up for it. In the 50K accounts we compared:
- Lucid 50K Flex: your best day can't be more than 50% of the profit (checked on its website, Oct 2026).
- Tradeify 50K Select: your best day can't be more than 40% of the profit (third-party sources, Oct 2026).
- Topstep 50K Trading Combine: your best day can't be more than 50% of the profit (third-party sources, Oct 2026).
- MyFundedFutures 50K: your best day can't be more than 50% of the profit (third-party sources, Oct 2026).
APEX and Lucid Pro don't apply it in the evaluation. Careful: in the funded account some firms use a different consistency rule before paying you out; read it separately.
The math you need to do
The rule turns your best day into a new target: real target = best day ÷ consistency, if that is more than the account's target. With a best day of $1,800 and a 40% rule, you need $4,500 in total, not $3,000. And every new day that beats the best one raises it again.
What happened in 20,000 evaluations per case
Two fictional traders in the same 50K account (end-of-day trailing drawdown of $2,000, $3,000 target, no daily loss limit or time limit). The only things that change are the consistency rule and the size.
With an edge: 45% win rate, average win $300, average loss $200, 2 trades a day
| Size | No rule | 50% | 40% |
|---|---|---|---|
| Normal size | 61.3% · 30 | 61.3% · 30 | 61.3% · 30 |
| 2× size | 45.9% · 9 | 45.5% · 9 | 42.8% · 11 |
| 3× size | 40.2% · 5 | 35.2% · 6 | 31.4% · 9 |
| 4× size | 38.6% · 3 | 29.4% · 5 | 25.9% · 7 |
Pass rate · sessions to pass (median). 20,000 simulated evaluations per cell.
No edge: 40% win rate with the same amounts; after costs, it makes nothing
| Size | No rule | 50% | 40% |
|---|---|---|---|
| Normal size | 26.9% · 32 | 26.9% · 32 | 26.9% · 32 |
| 2× size | 27.6% · 9 | 27.1% · 10 | 24.0% · 11 |
| 3× size | 28.0% · 5 | 22.1% · 6 | 18.1% · 9 |
| 4× size | 28.7% · 3 | 19.0% · 5 | 15.1% · 7 |
Pass rate · sessions to pass (median). 20,000 simulated evaluations per cell.
Why it doesn't affect you at normal size
With 2 trades a day and wins of about $300, a good day rarely goes over about $900. 40% of $3,000 is $1,200, and 50% is $1,500. The rule only bites when a single day can be worth almost half the target, which happens when you size up a lot or take one huge trade.
Why it exists: to stop lucky passes
Without the rule, the trader with no edge is better off gambling: at 4× size they pass 28.7% in 3 sessions (at normal size, 26.9%). With a 40% rule that shortcut closes: it drops to 15.1%. For the trader with an edge, big size was already hurting without the rule (from 61.3% to 38.6%), and the rule makes it a bit worse.
What to do
- If you trade your normal size, don't choose a firm for its consistency rule. The time limit and the type of trailing drawdown matter much more.
- If you've already had a very good day, work out your real target with the calculator and don't size up to get there sooner: an even better day raises it again, and the trailing drawdown is still there.
- If you wanted to pass in two or three days with big size, the rule is designed for exactly that, and even without it you would blow more accounts than you pass.
Simulated and hypothetical results, with the limitations that implies. Not investment advice. Firm rules change: check them on each firm's website. This article contains no affiliate links.