Secondary Y-Axis in Business Chart NAV 2013

Hi everybody,

I am currently designing a new business chart for my customer.
It will display the due quantities from Production Orders in dependency of the manufacturing policy.
This works very fine until now.

Now I have a new measure "No. of Production Orders".
There are ~100 due production orders but the due quantities is about 20.000.

I'd like to have a secondary Y-axis which goes up to ~100 and not ~20.000.
You can see the current state with ne no. of prod. orders in the green part of my screenshot.

What I'd like to have you can see in the other screenshot (just an foreign example).


Thank you.