Quote from JR-Welling:
Trader KGB:
The broker is ATG Marketplex.
For depth of market you can use the native hotspot platform but there is a java platform that ATG has which can also be used to display depth of market for any of the feeds that ATG has going into MetaTrader.
Although I'm looking around for an MT4 add it for depth of market. Actually now that I think about it I going to make a post on here to ask if anyone has a similar add in to recommend.
There are three options - Currenex into MT4, Hotspot Institutional into MT4 and Integral into MT4.
The java platform can be hooked up to display depth from either currenex, hotspot or integral.