That is what I was told, but it's still speculative and not proven. But, here is the list of signals that was brought to my attention.
MM SIGNALS 100 > I need shares 200 > I need shares badly but dont take it down to get em 300 > Take the price down to get shares.... 400 > Trade it sideways based on Supply and Demand 500 > Gap one way or the other, usually to the direction of the 500 trade. Sometimes -if in the middle -keep the price right where it is.