Answer to Stack Overflow question: http://stackoverflow.com/questions/37896900/how-to-give-plotlines-text-styles-on-opposite-side-instead-of-default

author(s): Mike Zavarello

HTML

<script src="https://code.highcharts.com/highcharts.js"></script>

<div id="container" style="height: 400px"></div>

JavaScript

$(function () {
    $('#container').highcharts({
        xAxis: {
            tickInterval: 24 * 3600 * 1000, // one day
            type: 'datetime',
            plotLines: [{
                color: 'red',
                width: 2,
                value: Date.UTC(2010, 0, 6),
                label: {
                    text: 'Plot line',
                    verticalAlign: 'middle',
                    textAlign: 'center',
                    rotation: 270,
                    x: -5
                }
            }]
        },

        yAxis: {
        },

        series: [{
            data: [29.9, 71.5, 106.4, 129.2, 144.0, 176.0, 135.6, 148.5, 216.4],
            pointStart: Date.UTC(2010, 0, 1),
            pointInterval: 24 * 3600 * 1000
        }]
    });
});