Can someone, please, give an advice, where can I find some information about something like "the ranking of the most traded commodities". Basically, I want to know how much are different commodities traded around the world. Thanks in advance!
You might have to go to the web sites of each of the major futures exchanges and look for volume figures there. You can start with www.cbot.com one of the largest US futures exchanges. Lots of info regarding volume, etc. on that site.