I'm a keen watcher of silver and copper prices. The problem is none of the sites I find to look for the latest metal prices have comprehensive graphs like you would find on Yahoo Finance or Google Finance do for stocks. It seems like every site with metal prices is pushing some buy our silver or buy our gold agenda so I find it hard to take what they list or are saying seriously. Is there a site that has good graphs for metal prices and has articles which are neutral when giving market forecasts? Thanks!
http://www.kitco.com/market/ This is the site I use but I don't know how comprehensive it is. Check it out.
ino.com is probably what you are looking for. It lets you customize graphs of the data. It has all the metals as well as most commodities and currencies.
I use finviz (basic charts) and forexpros (streaming futures prices). You can use most stock charting sites as well with the added benefit you can add things like moving averages etc and edit the chart with trend lines and stuff. For example, on stockcharts.com you use ticker symbol $gold to chart spot gold.
the best tracking site is where you actually buy and sell coins. every coin dealers have their own buy and sell quote. if you use others instead of the dealer you deal with. those sites will only serve you as a guide.