So what exactly is the best way to grab profits from the important and often explosive world of commodities? In my column last week, I showed you some of the spectacular moves that the four most actively traded commodities (oil, natural gas, gold and silver) have made over the past couple of years. And when you see the wide trading ranges, it also gives you an idea of just how lucrative they can be. But you don’t need to be an expert to take advantage. You just need to know how to