Part I : MQL4 Introduction

MQL4 programming language is contained in the MetaTrader 4 platform. MQL4 is most commonly used to create Expert Advisor (EA), Custom Indicators and Scripts. Expert Advisor / EA, as we already know, is a program to automate your trading based paramater2 logika2 and certain.  

Custom Indicators, almost the same as EA, just could not make trades. And can use function2 indicator. Script, just like EA, only be made only 1x when the script is executed. To create a program / script with MQL 4, the way is easy, just run enough MetaEditor. 

This MQL4 its structure and syntax similar to C / C + +. So if you've habit with C / C + +, should ga will have difficulty making the MQL4 program. The difficulty might be when debugging ..Further, MQL4 can interconnect with a DLL file. This allows programming of more complex and complicated, and of course, it's possible to be infiltrated spyware / virus by EA makers (especially those that use the DLL).