There is no way that you can know beforehand if the broker you have hired would lead you to a Forex cheat or not. When known, why would you hire him or her at the first place. So, the best way to avoid a fraud is to register with a reputed dealer. Before hiring one, research a little. Know about the dealers of good repute and their rates. No point paying a hefty fee for an unknown broker and at the same time, you should not think twice if you need to pay a little more for a reputed a broker because you are going to put a heavier sum of money at stake with him.