Usually Tradehill value will closely follow Mtgox... There can be no institution to control bitcoin because the very nature of bitcoin is decentralization... Otherwise the FED would control it the same as everything else. Although I think certain people are controlling the market. If you watch the real time buys and sells in the last 24 hours every time the value hits 11$ someone sells 1000 BTC. I have seen this multiple times in the past as well at different values. People are selling off massive amounts of coins as soon as a certain value is reached. Hopefully eventually the early adopters will run out (and perhaps the bitcoin scammers who have stolen huge amounts) and it will become a regular market. Until then I fear the BTC millionaires will control the market...