MQL4 is a "programming language" where you can write your own indicators or automate trading.
Knowing a little bit about C language is a pre-requisite for using it successfully.
![MQL5 - Language of trade strategies built-in the MetaTrader 5 client terminal](https://c.mql5.com/i/registerlandings/logo-2.png)
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Hi Guys,
I am just learning about forex and I don't understand exactly what MQL4 is. I also looked on a forex trading education website called ForexFace, which friends recommended to me. Anyone heard of it. I would be glad to get an explanation about MQL4. Thanks