Everyone praises Jim Rogers. And despite that the general trend of what he says is correct, he is very often wrong. For example, i remember when he said in 1986 that there will never be another Democratic President ever again, because the party will self-destruct itself. He was also very negative on Russia, only to see Russian ETFs charge higher and higher. If you truly want to learn how to trade and time the markets in commodities, you should consider buying the books of Linda Raschke and Toby Crabel. They trade for a living and currently run successful hedge funds. Their writings are almost out of print at this point, but you may be able to find it on Ebay or Amazon.