There are A LOT of hidden orders on the BIDS as well. 2500 were shown and a 72,000 share bid was filled. All OR NONE orders typically are not shown in the bid or ask. I believe only unrestricted open orders are listed.
I only buy NITE, CDEL shares if they are real low or a little above them when they are bidding low. The less they have, the better for everyone else. They manipulate shr prices and drive them down as they work together worse than any other MM's I know of. If their shares thin out, their ask prices rise to normal levels so they have more profit for their bargain buy shares to hold down prices later on, if you know what I mean.
Other thoughts?
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