Mintpal! What a crook! I placed an order yesterday at 0.00015020 and the price only dropped 1 point higher than my order. The next orders are at 0.00015300~ before I logout and just monitor it at bitcoinwisdom. Few minutes later, I noticed it got dumped and someone magically appeared at  0.00015021. The buy orders was thin because it was dumped recently up to 0.00015018..
I wonder how someone could possibly place a buy order faster than the guy selling BTC and catch his dump.

Or maybe it was mintpal selling BTC to his own buy orders to pump volume while avoiding the REAL buy orders?