I tried searching for the fees (if any) that you charge. Is it only the Mt Gox fees of 0.6% or do you have some as well?
Lets say I take that $1 and purchase bitcoin at the rate of $2.5228, then if there were no fees I would get 0.3963 BTC. So the fee of 0.6% from Mt Gox would be 0.6% or about 0.02378 of those bitcoin. How much would you take?
An example would be appreciated.
Currently you can't buy Bitcoins on Bitcoinica. Just like you can't buy oil by buying oil contracts. You are actually buying BTC/USD. (Perhaps you can read about Forex first.)
We don't charge fees. Everything is inclusive in the spread. Currently the price is 2.59988 / 2.66387, you can buy at 2.66387 and sell at 2.59988.