Highcharts: Line graph with half solid line and half dotted line?

Question

I\'m trying to show a time series line graph in highcharts - to the left of center is historical data, so the line needs to be solid. To the right of center is predicted da

Answer 1

var envelopBorder =[[-20, 63], [-20, 85], null, null,null,null,[19, 130], [35,150], [60,150],[65,148], [80,140],[80,100],[65,82],[55,70],[40,67],[20,63],[15,63],[-20,63]] ;

var dasshedBorder =[[-20, 85],[-20, 100],[1, 130],[19, 130]] ;

Highcharts.chart('container', {
    chart: {
        type: 'line'
    },
    title: {
        text: 'Operating Envelop'
    },
        xAxis: {
        title: {
            enabled: true,
            text: 'Evaporating Temperature (°F)'
        },

        gridLineWidth: 0,
        lineWidth:1,
        startOnTick: true,
        endOnTick: true,
        showLastLabel: true
    },
    yAxis: {
        title: {
            text: 'Temperature (°C)'
        }
    },
    plotOptions: {
        line: {
            dataLabels: {
                enabled: true
            },
            enableMouseTracking: false
        }
    },
    series: [{
        name: 'Normal',
        data: envelopBorder
    }, {
        name: 'Dash',
        data: dasshedBorder,
        dashStyle: 'dash'
    }]
});

Result :-

jsfiddle.net/7c9929mg