Here is the Sept DX chart. The trouble with each contract month is NO DATA previously. Just occasions trades that show up as dots way back when as this Sept 2011 contract was a 'back month' with little trading interest and contango showing. And now its the front month. I have to question the value of previous price points using what was a back month and is now a front month now with no premium or discount. But here it is. And at least this chart does suggest 77 is the major resistance level to deal with. But any prices from March back I'd have to question the value of.