So sry. but last question.. given the following -
Ask Volume BTC USD
6.76 43 (
43 292
6.77 10 (5) 53 358
6.80 13 (1) 66 445
6.88 1 (1) 67 455
Cumulative value is 67.
Say I wanted those 67, how much do you bid in mtgox? If you enter 67 x 6.88 in mtgox, it calculates cost at US$460.96. However, there are cheaper asks under 6.88, would I get those first... would only $455 be deducted from the account?
mtgox will buy the cheapest it can get.
if spread is a concern for you, just put a limit order beetween best bid and ask, your order will get filled pretty soon.
Example, if best bid it's at 7.30 and best ask at 7.60 put a limit order at 7.45, you will buy at a better price compared to buying at market.