MQL5 is the engine behind MetaTrader 5's automated trading features. It is a C++-like language that lets you create custom Expert Advisors (EAs), indicators, and scripts to analyze markets and execute trades without manual intervention. With its event-driven structure-think OnTick() and OnTrade()-you can react instantly to market movements and build sophisticated strategies.

The language is especially popular among forex traders and quantitative developers who want full control over their algorithms. There is a large ecosystem of resources, including an active community, ready-made code examples, and a marketplace for buying and selling trading robots. If you want to take your algorithmic trading to the next level, MQL5 is well worth exploring.