Quote from NY0BScalper:
No, it would kill competition among the ECNs and we'd all get stuck with paying flat fees to execute which would be higher than the current trading costs of today. The presence of BATS and EDGX have significantly reduced costs for execution (their spreads between the rebate and take-liquidity charge are much more fair than ARCA/NSDQ) and squeeze other ECNs to make them more fair. Having different execution options allows for trading strategies based off of inefficient order entry, and enhances liquidity.
CBOE $1.40 is really nice, as of now the best way to route is:
CBOE
BYX (when it's there on all symbols and becomes liquid)
EDGA
BX
NYSE
LAVA
BATS
EDGX
NASDAQ
ARCA
very well put edgx and bats are
much more fair vs nas and arca. I wish people would boycott nasd and arca and route everything to bats
what sweet about bats is it's cheaper to take on arca by routing to bats and then having bats route out to arca
If you watch as a price level goes, ECNs generally disappear somewhere close to that order, but not always... savvy executors can profit.