Perhaps its obvious but I guess there are several bots doing arbitrage between mtgox and tradehill, if so shoudn't be tradehill leading the price fluctuations because of the smaller market? Meaning that buying 100 btc in TH rises the price higher that in Mtgox.

Ok i guess i'm wrong, please clarify. I'm asking this because I think that if someone would want to represent in a buying strategy an upward trend, he might try it on the smaller market right?