Zone Recovery EA v1.5 Source Code MQ4 for MetaTrader 4 (MT4) is an Expert Advisor (EA) designed to automatically trade in a way that potentially recovers losses in a particular trading strategy. This EA likely uses a martingale or grid trading approach, where it attempts to recover from losing trades by increasing the trade size after a loss. It may focus on minimizing drawdown by using specific entry zones or by dynamically adjusting trade size depending on market conditions.