ElementStacks

HTML

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

<div id="container" style="height: 400px; width: 500px"></div>
Set new interval to: <input type="text" id="interval" value="5">

JavaScript

$(function () {
    var chart = new Highcharts.Chart({
        chart: {
            renderTo: 'container'
        },
        xAxis: {
        },
        
        series: [{
            data: [29.9, 71.5, 106.4, 129.2, 144.0, 176.0, 135.6, 148.5, 216.4, 194.1, 95.6, 54.4]
        }]
    }, function(chart){
        $('#interval').change(function(){
            console.log(this.value);
            chart.xAxis[0].options.tickInterval = parseInt(this.value);
            chart.xAxis[0].setExtremes(null, null);
        });
    });
});