I don't think people are willing to take the extra step if support behind them is weak, you might as well just "sit bid" and hope there are some dumps into the bid, which there usually is.
I interpret the action as being quite bullish, bids are building and eventually people will have to raise them if they actually want in rather than just kick the tires.
As for anonymous selling, isn't that always the case - ANON is usually the top seller. What I am more interested in is who is doing the buying, and why? What do they know? There has been a fair amount of buying at the ask over the last couple of trading sessions, and probably with good reason.
I see this thing back in the 30's by the end of the week, the only thing that concerns me is the weak-kneed DOW. Paranoia spreads easily.