I assume there are people faster and smarter than me. the fat middle is where I make money. ps i don't assume. I know.
TDs are the the feed for HFTs ___________________________________________________________________________ A look at their last 606 report shows approx half of the orders are sent to HFTs. This is where using a DMA and using a different types of orders other than market or limit will save you $. Pros abandoned using limit orders a long time ago since HFT's like to exploit those orders also.