Has anybody else noticed the ultra short term inverse relationship between mtgox <-> btce?
When gox goes up btce goes down and verse visa.
I'm not sure exactly why, but it might be because they are more difficult to fund.
They do have a lot of alt crypto-currencies, which can take away from what would normally be put into BTC.
There's also the investors mentality, some exchanges have more bears than others.
Perhaps there is something to do with the limited supply and demand as well.