Anywhere there is big money to be made...there is big money backing approaches to making it..
Direct access killed Wall Street´s commission business...thus their focus is to make it some other way with equities as can be referenced in the quarterly earnings reports of the publically held entities...and through some reporting hedge fund entities...
Also there are some pseudo front running programs that have been designed by the bigger market makers....
What is interesting here is that they have ended up fighting amongst themselves...
Look...having big computer players is good for daytraders...they actually create..not take away opportunities...
Remember...Ferraris are fast...fun to drive...and run circles around big load hauling trucks....
Good trading...