The Expert Advisor Explanation

It is a mechanical trading system (MTS) written in specialized language which is MetaQuotes Language 4 (MQL 4) and linked to a trading chart. An Expert Advisor has the capability to notify traders of the trading, chances and also to automatically execute positions in their trading account, sending them directly to the trading server. Like all experts systems, Expert Advisors supports the testing of strategies with historical data, with the trade entry/exit points being represented on the charts. Furthermore, the executable code of the Expert Advisor is stored separately from its source text

Starring in writing your custom [Expert Advisor] has never been easier. To be able do so, traders only need to learn how to use a very simple language - the MQL 4.

There is a great variety of trading strategies developed by a lot of traders using MQL4 language and [ForexGen] traders can depend on it as a good start to get familiar with MQL4 language and allow traders to incorporate the previously accumulated experience.