These days I have tested the broker FXOpen, but I don't like the excessive fees that depositing or withdrawing money involves. But unfortunately I have not found many other options to trade with bitcoins in the Forex market, especially when we are looking for a reliable and experienced broker.
I dont understand what broker really does and I haven't heared about that thing in bitcoins. But when it comes to fiat, maybe a forex trader pro will work. What I do in trading bitcoins is that I buy dumped coins then I sell it when the price doubles or triple. As simple as that, no fees from brokers. But, Id love to have a bitcoin broker as it increases the chance to make my bitcoin increase.