Two words: low volume.
Now that might change but until it does it doesn't show any conviction in the reversal.
I don't quite buy the low volume argument (whatever it may indicate for future price movements).
http://data.bitcoinity.org/#caaaaddgaaYesterday there was quite a bit of volume, in particular on btcchina. Not as much as in the last few days during the crash, but more than last month's average.
thats what i was thinking. if the price action was following a different market than there would be an objective quantified number that you are trying to reach therefor there wouldnt be any disagreement among bulls and bears in the trailing market, no debate about whether the price should be higher or lower. That would lead one to expect low volume. I think this is what we saw, mtgox was trailing btcchina and on btcchina we have very normal volume.