Gold One EA v1.0 Source Code MQ4 is an Expert Advisor (EA) for MetaTrader 4 (MT4) that is designed for trading XAU/USD (Gold) on the forex market. It is typically a fully automated trading bot that uses various strategies to trade gold in the financial markets. As the name suggests, it may be tailored for gold trading, which is known for its volatility and liquidity, making it a popular choice for both short-term and long-term traders.