You can set different stacking groups:
$(function () {
$('#container').highcharts({
chart: {
type: 'column'
},
xAxis: {
categories: ['jack', 'jane', 'julie', 'john']
},
yAxis: [{
title: {
text: 'Grades'
}
}, {
title: {
text: 'Age'
},
opposite: true
}],
plotOptions: {
column: {
stacking: 'normal'
}
},
series: [
// first stack
{
data: [2, 1, 2, 3],
stack: 0,
yAxis: 0
}, {
data: [5, 4, 6, 6],
stack: 0,
yAxis: 0
}, {
data: [10, 9, 11, 10],
stack: 0,
yAxis: 0
},
// second stack
{
data: [18, 22, 17, 24],
stack: 1,
yAxis: 1
}]
});
});