I do not know enough about algorithm-driven High Frequency Trading to comment intelligently other than to say 100% without a doubt that someone is making a huge pile of cash from HFT or it would not be done.
You can watch an animated GIF that chronicles the rise of the HFT Algo Machines from January 2007 through January 2012 by clicking on the link.
The GIF starts out slow and boring, but watch the progression through the end.
Mike “Mish” Shedlock
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