Hi!

I'm trying to create a second Yaxis in my lineChart with HighCharts API

the problem is i dont know how it works. I have tried to modify and then put the JSON (from HighCharts API JSfiddle) in both property of the linechart: YAxisJSON and HighchartsJSON but it doesn't work, it makes my linechart disappear. 

(I use this JSFiddle: https://jsfiddle.net/gh/get/library/pure/highcharts/highcharts/tree/master/samples/highcharts/demo/combo-dual-axes/) 

The situation is, i already have a Linechart which is work fine. But it has only one Yaxis column by default, my task is to make a linechart with two Yaxis columns and the second one is the same as the original one.

pictures to describe my issue are attached in .zip file above.

thank you all!