Dual Scale Graph - Power Bi

Hello,

I am making a graph like below with different sizes on the x-axis, and on the y-axis a value in quantity and a value in percentage.

The problem I have is that each value on the ordinate has its own scale, for example on the left the quantity per size (pink = StockMax) and on the right the percentage for the curve (SMR).

But what I want is that the curve is in percentage of the values in pink for example for the size 056 I have a quantity of 6 and the percentage is 100%, I would like the point of the curve to arrive at 100% of the quantity so at the top of the pink bar at 6, and so on for the others.

Do you know how I can do this?

Thank you in advance for your help!