Seriously, I'm just trying to understand. Their website talks about "lightning fast execution" What does that have to do with data feeds?
The reason I said this is b/c speed is a main difference. As well with different data providers. Go to youtube and type in Zen-Fire and you'll see the speed difference between some of the data feeds. You always want fast when trading.
It's both a data feed and an order server. It also has historical tick data as well. It just lacks EOD historical data but you can build it off ticks.
Zen-fire is the Skyline GT-R of the trading world platform data feeds!!! FAST as hell and yet affordable!!! http://www.youtube.com/watch?v=9qMgeRD1ak8&feature=channel