The Metatrader EA or expert advisor is a whole family of forex robots that work on the free downloadable software platform called Metatrader 4. MT4 basically acts as a platform or framework that trading robots can be built on. That’s why, when you buy a trading robot, you usually have to download Metatrader 4 and install it on your computer before you can set up the robot or expert advisor itself.

Automated trading systems such as expert advisors will act for you in the market, making...