Not sure of your background or how long you have been trading but you seem to be aware of the industry...what happened to INCA, ARCA, BTRD, ISLD and the rest of the ECN's? No more SOES? I know there was a consolidation and several merged, but I dont see any individual ones at all on even the most active stocks. I am guessing that NASD is the ticker for the best bid best offer?
News 
Market Data 
Discover 
AI
