Are you using Ninja with Zen Fire? I've only demoed it but it looks sweet if the live is the same. How are your fills...any slippage, etc? Still sticking with my bucket shop as I don't like being confined to a 125,000 size.
Yes zenfire thru Mirus/RCG. The sizing takes a little getting used to if you've been trading spot for a while. Like referenced above, the only real liquidity is in the full contracts (that is until they change the margin requirement on OTC spot fx trading to 10:1 and drive everyone to trade the futures). I pretty much only trade using limit orders and have no problem getting filled on 10 or less contracts. They even provide free NT for use, but without the ATM strategy turned on. You need to buy a license for that.