The biggest market mover is the people who thought they had bitcoins in Mt.Gox. When they replace (which I believe is going on), the price can rise a lot. We are talking about 100,000s of coins of extra demand.
This is why you can rest assured there is no 21 million Bitcoin cap on BTC. People buy; the coins get stolen from them and dumped in the market for the victims to rebuy ad infinitum.
What? No.