Short answer: FTMO allows Expert Advisors, and plenty of traders pass evaluations with them. The failures come from a handful of rules that automated traders skim past. (Rules change — always confirm against FTMO's current terms before trading.)
The rules that actually catch EA users
- Mass-sold commercial EAs. FTMO restricts strategies that mirror many other accounts — which is exactly what a popular marketplace robot does. A strategy generated uniquely for you doesn't have that fingerprint. This is the single most misunderstood point, covered in depth in our prop firms that allow EAs guide.
- Daily loss is the killer, not total drawdown. At the time of writing FTMO's limits are 5% daily / 10% overall. An EA that risks 1% per trade but holds several correlated positions can breach the daily cap in one bad session. The math is unforgiving — see drawdown explained.
- News and weekend behaviour. Depending on your account type, positions through major news or the weekend can be restricted. An EA that doesn't know the calendar can break a rule you'd never break manually.
- Consistency and gambling-style behaviour. Averaging down, one-shot oversized trades and revenge-sizing patterns draw scrutiny even when they're a robot's doing.
Making an EA FTMO-safe
The reliable approach is to make the limits part of the strategy, not a hope: hard daily-loss and total-drawdown circuit breakers inside the EA itself, position caps across correlated pairs, and sizing tested against the worst historical day — not the average one. Our guide to designing prop-firm-safe EAs walks through the architecture.
This is also exactly what Nebula's prop-firm mode does: you set the firm's limits before breeding, every generated strategy is optimised under those constraints, and the exported EA enforces them as hard stops. Because each strategy is bred fresh for you, it's yours — not a copy running on a thousand other challenge accounts.
We are not affiliated with FTMO. Prop firm rules change frequently — verify everything against the firm's current terms. Trading carries a high level of risk; nothing here is financial advice.