An Expert Advisor is a piece of software written specifically for the MetaTrader Platform. An Expert Advisor can just advise traders which trades to make or can be programmed to automatically execute the trades on a live account. "Rich Owl" is designed mainly to trade EUR pairs. However the EA is very well capable of trading other currency pairs. The EA has tendency to trade when market is in a calm condition and there is not an expectation of big moves (ATR Indicator).