XAUUSD expert advisor: how gold trading robots work

An EA runs on every incoming tick: it recalculates indicators, checks entry conditions and sends orders when the rules align. Three layers matter — signal generation, position sizing and trade management.

The advantage is consistency: the robot never skips a valid setup and never widens a stop out of hope.

XAUUSD moves several hundred points a day, spreads widen sharply around US data releases, and weekend gaps are common. A strategy built for EURUSD usually fails on gold because its stop distances and lot sizes are far too small for the volatility.

A gold-specific EA therefore needs a spread filter, a news window and volatility aware stops (for example ATR-based).

With a standard lot, a 1.00 USD move in gold is roughly 100 USD. Use: lot = (balance × risk%) ÷ (stop distance in USD × 100). On a 5,000 USD account risking 1% with a 2.50 USD stop, that is 0.20 lots.

Fixed lot sizing is the most common reason accounts blow up — the lot must shrink as the stop widens.

Use "every tick based on real ticks" in the MT5 Strategy Tester, at least 12 months of data, and your own broker's feed. Look at maximum drawdown and trade count before looking at profit.

A curve with 300+ trades and a 12% max drawdown is far more trustworthy than one with 20 trades and a spectacular return.

Run two to four weeks on demo, then start live with a small portion of your capital and a conservative risk percentage. Set a daily loss limit, review performance monthly, and re-check settings whenever the market regime clearly changes.