http://www.rithmic.com/connectivity.html http://www.rithmic.com/partners.html The guys at vision are good and Rithmic will let you get...
Maybe xignite? Xignite.com
Sorry, was mistaken, after digging for it that average holding period claim came from TradeBot. I'd definitely take it with a grain of salt.
That was GETCO and indicative of their bread and butter.
To distribute real time prices you will have to pay for a distribution license to the exchange. ffs, market data isn't free.
Separate names with a comma.