they use the PSE exchange. put your segment view on 1 minute, they go on at 10.30-3.00 pm est, they are always market sells, at the market and round lots like 25,000 or 40,000 as high as 140,000 .... some time they'll respond with a 10,000 extra sale right after the original. their are a few small fries that copy the trade, you also can match up the trade with fitb, and other regionals,they use a grouping of them, sorry no name of a firm, they are young asians, males, two that i saw on tv, they never use a bid offer, its a momentum trade.
thats a bout it. i wrote wash dc about it, i think the follow up on it would be "to much work" for the sec. maybe not. its legal ...if they have the stock. the mm has no response to the action, comments?