Вы можете установить pointPlacement
свойство для line
серии:
series: [{
name: 'X',
type: 'column',
color: '#F4811F',
data: [1, 1, 1]
}, {
name: 'Y',
type: 'column',
color: '#8EB950',
data: [1, 1, 1]
}, {
name: 'Z',
type: 'column',
color: '#5C97D3',
data: [1, 1, 1]
}, {
name: 'AvgX',
type: 'line',
lineWidth: 4,
pointPlacement: -0.2,
color: '#F4811F',
data: [2, 2, 2]
}, {
name: 'AvgY',
type: 'line',
lineWidth: 4,
color: '#8EB950',
data: [3, 3, 3]
}, {
name: 'AvgZ',
type: 'line',
lineWidth: 4,
pointPlacement: 0.2,
color: '#5C97D3',
data: [4, 4, 4]
}]
Демонстрационная версия: http://jsfiddle.net/BlackLabel/m4y0xepo/
API: https://api.highcharts.com/highcharts/series.line.pointPlacement