It make sense this: when when you sell your BTC to USD in the expensive exchange, you get profit and then buy LTC to transfer to cheaper ex =>
sell the LTC to BTC and transfer to expensive ex =>
sell the BTC to USD and get profit?
I tried it and it seems that doesn't work I don't know why
Forward your detailed spreadsheet to
admin@exchange.blue, I'll take a look at it and hopefully point you at the right direction.