score:1

after tons more searching, i found the answer in an unexpected place.

you can use the "stack:" series option to group things to stack together.

{ name: 'series1', data: 'data1', stack: 'stack12' },
{ name: 'series2', data: 'data2', stack: 'stack12' },
{ name: 'series3', data: 'data3', stack: 'stack3' }

in this example, series1 and series2 would stack, while series 3 would stay separate.


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