I never knew that EDGX has access to dark pools between the spread. Spread is 50.00 * 50.05 and you send a sell mkt order and say there is some buy dark liquity, @ 50.02. Will the execution be @ 50.02, or will it hit the bid. My question is in order to access this dark liquity can you send a MKT order, or do you have to send IOC orders for example Sell Lmt IOC 50.02 to access the dark liquity Also which other ECN's have access to Dark pools