frzframe... when the MM's cover they do it with retail buyers
remember they make their cut or commission on the difference between buy and sell...i.e. today's open was .02 lower than the closing from yesterday... huge difference right there.... and when sellers start to let go and at the bid... the difference becomes greater... thus if they had to cover, it would be disguised as a trade on the board.
MM's inventory their trading shares... keep that in mind. Thus they could have quite a bit....
there are many ways they can do it and it would not appear to be so.... but it is being done.