Thanks. Excel isn't the problem I'm having, it's conceptualizing the relationship between price and production.  They move percentage-wise in magnitudes that are incompatible, so you have to dampen the price magnitude by several factors.

I've tried indexing them to a "100" number but then how do you choose what month corresponds to "100" for both except for arbitrarily?

Maybe I'll post some of my best aborted attempts later so you can see what I mean.

Maybe there isn't anything relevent we can draw from the two? Maybe there is, I just can't get a graph to show it.

That's why you want two axis - it lets you have both variables on difference scales on the same graph.
Yeah, you're right, I'm gonna try that next.