Hello does anyone have any experience dealing with futures data? I am struggling with the documentation and would like to see if anyone can help me pull some futures data. Why can I pull S&P data and not the gold, silver, wheat or anything else for that matter?

Also is it possible to see what contracts make up the historical data chain? Is there a working example. There is a function on Ondata class but I can't seem to get it to work.

Any help when dealing with futures would be much appreciated.