It is boring, but probably good for bitcoin
There's what I'd call an 'invisible wall' at 30.40 which gets topped up to the 500+ BTC mark every time it sells out and the price goes higher. I've noticed this has happened repeatedly today. I've been watching on and off for the last 10 hours or so.
It looks like someone is selling off a large amount of BTC in blocks of around 500 at a time so it doesn't appear as a single large ask which would probably drive the price down towards and eventually eat into the bids.
I haven't been watching the BTC orderbooks that closely until recently so I'm not sure if this kind of thing happens very often.
Just a little observation.