However, the selling rate and buying rate may differ much at the money changers. Your potential profit is eroded much by them. Same problem exists in banks. And banks apply minimal amount of exchange when you do so.
I was always looking for an investment tool for small investors. It doesn't require minimal contract size. Yet it provides short spread of selling and buying rate. Money changers' selling and buying rate may have 250 ticks for US dollar. That is selling rate at i.e. 1.7000 and buying at 1.6750.
Finally such investment tool is introduced by POEMS Company. Its new product - FX INVEST provides a spread of only 50 ticks. The balance of your account even has interests. You use "bill payment" function of any bank's internet banking to transfer money to your FX INVEST account. You submit online request via POEMS website and POEMS will issue cashier's order to your designated bank account.