This stuff is fricking voodoo. There is only one contract for April that I see and its only for 250. I can understand all the numbers change as people place bids but the VOLUME changes, too? WTH?
DO NOT venture into that marketplace until youve educated yourself. You have a lot of questions indicating you are new at this.
They will turn you over, have their way with you, and THEN take all of your money.
You are much better off buying physical metals.