Turns Metatrader4 into REST API server.

Note: make sure you have VSredist: https://www.microsoft.com/en-ie/download/details.aspx?id=48145

Copy MQL4 folder to Data folder of mt5 (how to get where is Data folder is localted, open mt5, click File->Open Data Folder or just click Ctrl+Shft+D). In MT4 Navigator (to show Naavigator click Ctrl+N) select Expert Advisors->Advisors. Right click on RestApi, select Modify. Editor will be opened, press F7 to compile. Done.