Prop Firm EA Rules and Risk Settings
A prop-firm-safe EA is not just a profitable robot. It must enforce daily loss, max loss, spread filters, news rules, trade caps and emergency lockouts before the prop firm rules are breached.
Core EA Rules
- Daily loss guard based on equity, not only closed balance.
- Maximum total drawdown guard.
- Maximum trades per day.
- Maximum open positions and total open risk.
- Spread/slippage filter.
- News blackout if the firm restricts news trading.
- Trading suspension after losing streak.
- No unlimited martingale or uncapped grid recovery.
Risk Settings That Usually Survive Better
For many prop challenges, 0.25% to 0.75% risk per trade is more realistic than aggressive 2% risk. The exact number depends on win rate, stop size, max trades/day and the firm’s daily loss rule. The EA should reduce lot size automatically when equity is near the daily limit.
Why Grid EAs Fail Challenges
Grid EAs can look smooth until a trend or news shock expands floating drawdown. Prop firms usually judge equity, so hidden floating loss can breach rules even when closed balance looks safe.
Build a Rule-Enforcing EA
Use the checker first, then request a daily drawdown limiter, risk manager, or full prop-firm-safe MT5 EA.
Check EA Rules Daily Drawdown Limiter