Updated 2026-03-08
OneFunded EA & Bot Policy Rule Explained
OneFunded
Quick Answer
OneFunded allows EA & Bot trading for all automated trading strategies during both Challenge and Funded phases.
The rule permits unrestricted use of Expert Advisors and trading bots across all account types and phases. There are no specific restrictions on automated strategy types, though general trading rules still apply. Violations would only occur if automated systems breach other account rules like maximum drawdown or daily loss limits.
Key Rule Details
EAs Allowed
Yes
Restrictions
Automated trading available
HFT
Prohibited at all firms
Arbitrage
Prohibited at all firms
Copy Trading
Not allowed
Calculation Example
Common Mistakes
Using Untested EAs
Traders deploy automated systems without proper backtesting or forward testing first. The EA may have hidden flaws that cause rapid account blowouts. For example, an untested martingale EA could turn a $100 loss into a $5,000 account breach within hours of deployment.
Ignoring Maximum Spread Settings
EAs continue trading during high spread periods when manual traders would pause. During news events, spreads can widen dramatically causing EAs to enter poor-quality trades. A $1,000 position during 50-pip spreads instead of normal 2-pip spreads results in $480 additional costs that weren't factored into the strategy.
No Kill Switch Preparation
Traders assume EAs will always perform correctly without emergency shutdown procedures. When market conditions change suddenly, malfunctioning EAs can breach daily loss limits before manual intervention. An EA hitting a 4% daily loss limit on a $100,000 account means immediate failure and $4,000 in losses.
Running Multiple Conflicting Bots
Using several EAs simultaneously without considering their combined position sizing and correlation. Two trend-following EAs might double down on the same currency pair unknowingly. This creates oversized positions that appear acceptable individually but violate maximum exposure rules when combined, risking account termination.
Protection Strategies
Implement Personal Drawdown Buffers Below Limits
Set your EA's maximum drawdown at 80% of OneFunded's actual limits to create safety margin. If OneFunded allows 10% maximum drawdown, program your EA to stop at 8% drawdown. This buffer prevents small calculation differences or slippage from causing unexpected rule violations.
Use Conservative Position Sizing Algorithms
Program EAs to risk no more than 1-2% per trade regardless of signal strength. This ensures even a string of losses won't approach daily or total drawdown limits quickly. Conservative sizing allows for 10-20 consecutive losses before approaching danger zones on most account sizes.
Set Up Real-Time EA Monitoring Alerts
Configure alerts when your EA approaches 50% and 75% of any account limits including daily loss or total drawdown. Use mobile notifications or email alerts to monitor automated systems remotely. Early warnings allow manual intervention before EAs can breach critical thresholds and terminate accounts.
Avoid News Trading Unless Specifically Designed
Disable EAs 30 minutes before and after major news releases unless they're specifically programmed for news volatility. Standard EAs often malfunction during extreme volatility periods causing rapid losses. Manual oversight during news prevents automated systems from making catastrophic decisions during market chaos.
Related Rules
OneFunded Comparisons
Frequently Asked Questions
Disclaimer: This guide is for informational purposes only and does not constitute financial advice. Prop firm rules change regularly — always verify current terms on OneFunded's official website before purchasing a challenge. Updated 2026-03-08.