Not able to install metatrader 4

 
I am trying to install and run some EAs on metatrader4. All my code is in mql4. But when I install the metatrader4 it does not show mql4 codes in its data folder. Can somebody help me get up running with mt4 ? I am new to the platform and any suggestion will be highly appreciated. Thanks
 
From where? You must download from your broker to get MT4.