You are already making a huge mistake of looking for the best trading platform and leaving out the knowledge that you need to gain first and foremost before even thinking of any trading possibilities. It is not really by the exchange platform and sure, some are better based on the idea that in terms of security of funds, you may be able to rely on some, but not entirely. Nevertheless, regardless of the platform, what you need is the knowledge of strategies you will need to be able to trade the market effectively.