My thoughts about FOREX

Lately I have been researching about FOREX. There are many companies world wide that provide systems for FOREX, which makes the final decision quite difficult. What company should I join regarding FOREX? Can I trust this company? What is the leverage differences and the system regulations? So many little things to look into about the companies. I found some FOREX company logos that were interesting. I will be researching the companies details and the service they can provide. If anyone has any advice about FOREX companies please let me know.