I just want to be able to buy bitcoin at market value when the price drops.  For example MT gox price now is $7.
I would love to buy at $7 on tradehill but there's about 400 bids between 7.22 and 7.60
It will not get down to $7 unless mt gox is at $6 or something.

I think it's the lack of sellers on tradehill, that causes bidders to bid up the price higher than mt gox