I agree with you that different trading sessions give different opportunities because in every session there are new money enter to the market , generally the European session and the American session are more active and it's better for you to trade only in this time because the market moves very well and you can make a good profit in a small time. I think the different sessions offer different opportunities for trading. Logically the movements of each session are different. In my opinion the European session offers better opportunities to operate. During this session there are few false signals which minimize risks.