I downloaded the Delta platform and the Level II and it reminds me of other L2 programs Ive used..very interesting and active.
It works in step with the MT4 platform, but is not INSIDE the MT4, so to do a trade you have to either have the L2 window overlaying the MT4 or do an alt-tab to access it.
Now if you had two windows then it would not be an issue..most active traders have two monitors going to access a trading platform and maximize charts (I do not currently).
I also noticed on Delta and Jade that the commish is round trip..so 5 bucks I think on Delta and 7 on Jade includes buy and sell, thats nothing for what you gain on the spread and being ABLE to slide inside some big spreads, say like the LB.Yen, plus the quantity of pairs are crazy here.