Prop Firm Drawdown & Breach Calculator

Most firms compute it from your start-of-day balance or equity (check which — it matters): if yesterday closed at $102,000 with a 5% daily limit, your equity may not touch $96,900 today. Floating losses count in real time at nearly every firm, so an open position can breach you before it hits its stop.

Trailing drawdown moves your breach floor up as your equity makes new highs. With a $5,000 trail on a $100,000 account, reaching $105,000 moves the floor to $100,000 — your starting balance becomes a breach level. It converts profits into risk and is the leading cause of funded-account failure at futures firms like Apex.

It resets at a fixed server time set by the firm — often 5pm ET (futures/CME close) or midnight CET for European brokers, which is usually not your local midnight. Holding a floating loss into the reset boundary is one of the most common avoidable breaches.

Professional practice is to treat 40–50% of the official limits as your personal maximum: a -2% personal daily stop against a 5% limit makes an official breach nearly impossible and interrupts revenge-trading spirals early.