What is "mql4"

Metaquotes Language 4 (MQL4) is a high-level object-oriented programming language designed to write automated trading strategies, customized indicators, techniques for analyzing various financial markets. It allows you to not only write a variety of expert systems, designed to work in real time, but also create your own graphic tools to help you make business decisions. MQL4 is based on the concept of the popular C++ programming language. Programs written in MQL4 language have different characteristics and purposes within Metatrader4: Expert Advisor, Custom Indicator, Script, Library, Include File, which can be better understood directly on the site http://www.mql4.com.