I am new to the ECN world... When I add liquidity i am basically selling a stock right? and if I Remove liquidity I am buying? also... how can people buy and sell at the same price and still generate ECN fees when say BATS pays roughly 2.5/1000 shares but commissions are more than that? I pay 6.5/1000 shares and i would have to sell it at least +.02 cents to profit if i collected ECN fees. Even if I collected the 2.5/1000 wouldn't i have to route it somewhere where they would charge a fee? so technically i am not collecting the 2.5?