Hey all,

So I'm writing up a program to calculate the trade fees for me and spit out what I need to sell for to break even after a purchase. (For Scalping)

I'm a little confused on how to calculate the fees though.

So here's what my impression is.

When I buy bitcoin: tradehill takes the commission rate out of the USD you are spending then buys the bitcoin.

When i sell bitcoin: the Commission Rate is taken from my bitcoin then what's left is converted into USD.

Is this correct? Does it even matter which currency i take the commission from when i write the program?