Why do consistency rules exist?
With simulated funding prop firms pay rewards from their own pockets and they have to protect themselves from lucky gamblers who sometimes strike a big move on max allocation without much skill.
Typical consistency rule: none of your winning days can exceed 30%-50% of your total profit to request a payout. This means that even if you manage to get lucky, you will need to show some more luck.
How it works
Say, your total 5 day profit is $2700 with days looking like this:
Day 1 profit: $200 (7.4%)
Day 2 profit: $350 (12.9%)
Day 3 profit: $1,800 (66.6%)
Day 4 profit: $150 (5.5%)
Day 5 profit: $200 (7.4%)
If your account has 30% consistency rule, you are violating it. It will mean you will have to keep trading for the total gain to reach $6,000+ to reduce the Day 3 profit ($1,800) from 66% to no more than 30%. Only after that you will be able to request a payout.
Accidental profit?
What if you didn't mean to gain that much and you don't feel confident to trade up to $6,000 before requesting a payout? You may want to intentionally lose some profit on Day 3 before the session closes.