Possible that MM's are letting the orders stack up and are holding them for a run? A friend that trades said he has seen this before(I called him for a opinion on it) - He said sometimes they let the orders stack up and wait to fill them because when it runs they will make more money causing a frenzy with what looks like the market being flooded with orders - but in reality they orders filled are just orders they have let stack up.
Anyone have any thoughts to the validity of this - Sort of makes sense but I am no expert.