Hi,
I've been using VSA on Forex for a while now without much problems. My trading results have been way better than when I was trading S/R breakouts. I still use S/R and trendlines for my trading, but my decisions on when to enter and exit are based on VSA. I've been using an MT4 platforma as well without any problems. Sure, Esignal is the best way to go, but if you can't afford to pay $120 monthly for real time date, then you might want to try opening a demo account with Interbank FX, from what I've read elsewhere, it seems to have a good volume data feed, not as accurate as esignal, but pretty similar at times, and should get the job done.