Nobody is intentionally insulting you or anyone else, B.
If you think 15 million shares are being moved by folks with Etrade, or TD accounts then I'd simply say you're wrong and leave it at that.
A key principal in HFT algorithms is to (within fractions of a second) place hundreds or thousands of orders to buy or sell and cancel those orders before they are filled in an effort to soak the book and give an appearance of buy or sell pressure which moves the stock price in a given direction.
FYI.... Unsettled funds applies only to nonprofit accounts or securities which have margin restrictions or margin enabled accounts which have exceeded or are near maintenance levels.... SECURITIES BEOKERS AND DEALERS or Market Makers do not have "unsettled" restrictions at all...
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