MetaTrader 4 is one of several popular platforms for traders in markets. It allows automated systems via trading bots, scripts, and custom indicators. These functions are usually programmed in MetaTrader’s own language, MQL4. EX4: This refers to an executable version of the MQ4 source code. It is in machine code https://landenceeeb.blogprodesign.com/52456954/ex4-to-mq4-fundamentals-explained