I'm unable to find any real documentation if this feature is even released yet as part of SimCity 2013.
Is there a way to access the global market within SimCity World? Apart from just selling commodities though my trade depot I was under the impression there was a way to do analysis and look at trends in market prices.
When I go to SimCity World I only have Leaderboards and Challenges. At least one of my cities in the region has a Trade HQ.