One way of discovering if the free online forex trading course that you are looking at is of the highest standard is by looking at how much of the information contained within it is replicated elsewhere. You will soon learn that a lot of the information you find in some of the free online forex trading course books can easily be found when you search the net.
So rather than using these books or courses to teach you how to trade on the Forex market instead use the advice and articles about the subject that are being offered on other sites. Plus why not join one of the many forums that have been set up and discuss your issues with some of the people here. They are people who have been trading on the Forex market for some time and will often offer you the best advice when it comes to finding a suitable course for learning about Forex trading.