This is just manipulation with price, you can check at http://bitcoinity.org/markets,
Huobi and Bitstamp, for 5 days purchased over 500k bitcoins,
It is so funny, 500k bitcoins for 4 days, and after that for next 4 days purchased less of 10k bitcoins.
It is BIG manipulation with prices, Just check and compare volume and time, it not real.