Expert Advisor (EA)

Also called: EA, robot, trading bot

An automated trading program for MetaTrader — opens, manages, and closes trades based on coded rules.

EAs run inside MT4 or MT5, monitoring price tick-by-tick and executing the trading logic the developer wrote. They can be 100% automated, semi-automated (signals only), or trade-management aids.

The MT4 community has produced tens of thousands of EAs — both excellent and dangerous. Always backtest and forward-test on demo before going live.