The only source of help is the forum maintained by developer MetaQuotes. There is no guarantee you will get right answers in the forum. There is no guarantee you will get ANY answers from developer. The broker feels not responsible for technical side of this product and sends you to the developer forum.
The developer firm refuse to provide commercial support. They have horrible attitude and instead of support let you know, that you, as trader, are not their customer.
The platform by itself is a badly implemented programming language which reminds of C. The chances are hightI that you will get a lot of problems trying to implement your system. When I asked for support the developers will let you know that you are lazy, stupid, whatever....

MetaTrader 4 is a good free software. I am not sure if it is a vendor isssue of MetaTrade 4. I experienced downloading two copies of MetaTrader 4 of different brokers and the indicators were different, although the data stream was the same. The indicator was the Average Directional Movement Index which is a canned / written by MetaTrader. I hope that they can fix that because I like to use MetaTrader4.