I suggest you Metatrader 5. Because it is MT5/MT4 forum, and because MT5 is most advanced and user friendly platform:
Any other platforms are not competitive with MT4 and especially with MT5.
Forum on trading, automated trading systems and testing trading strategies
How to Start with MT5, a summary !
Alain Verleyen, 2013.03.15 16:12
How to start with MT5 platform : summary.
As our topic about "How to start with Metatrader 5" is going to be huge, here you find a summary, with main links.
Work in progress, stay tuned :-)