The history of the foreign exchange markets is quite long and illustrious. One of the most important events in forex strategies in the past century is the dropping of the gold standard. This has allowed several important currencies to freely float, resulting in a massive difference in how currency is traded the world today. However, many currencies are pegged to other foreign currencies, usually the US dollar. There is much debate about the advantages and disadvantages of such actions and  forex strategies  continues to be written. More information on currencies of all sorts could easily be found online, in newspapers, and in various financial publications and trade magazines.