By far the best commodity to trade at the moment is silver, though you can always short the other commodities. The only commodities CMC trade are:
- Spot gold & silver
- Platinum & palladium futures
The strategy is to trade these commodities off a moving average - I use MAV(simple, 40), MAV(exp, 30). When it pulls back to the MAV(40), I am inclined to take a position. I see silver going to $US20/oz.