The Bank Credit Analyst is probably one of the best prognostication services in the world. Their calls are highly astute.
The are quite expensive, but they offer a free tidbit every day. If you visit the site, select the recent column on "Commodties ..."
http://www.bcaresearch.com/public/index.asp
The gist of it is: metals are set for a fall, after a sustained up period, because demand is set to crash - both in industrial metals and precious metals. However, they recommending holding one's position in their belief that the general trend remains up.
Check out their other predictions. I tend to save them and then check a year later. Very impressive.