Range change in Highstock dynamically

Question

I want to dynamically change the range in the chart. If I go from a large value to a smaller one, everything works fine. But if I want to go back to more, nothing will happen.

You can try this here: http://jsfiddle.net/Charissima/wkBwW/15/

Press the "Range 50" button and the password "Range 20". Then "Range 50" again. You can see the color change, but not the range.

I tried to figure out how to solve this problem, but to no avail. Hope someone can help me.

<div id="container" style="height: 400px; min-width: 600px"></div>

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

<button id="button_20">Range 20</button>
<button id="button_50">Range 50</button>

$(function() {
$('#container').highcharts({  

    chart: {
    },

    rangeSelector: {
        enabled: false          
    },

    exporting: {
        enabled: false
    },

    title : {
        text : 'Ranges'
    },

    navigator: {
        enabled: true,
    },

    xAxis: {
        lineColor: '#ffcc00'
    },

    series : [{
        name : 'Random data',
        data : (function() {
            // generate an array of random data
            var data = [], i;
            for( i = 1; i <= 100; i++) {
                data.push([
                    i,
                    Math.round(Math.random() * 100)
                ]);
            }
            return data;
        })()
    }]

});

// the button action
$('#button_20').click(function() {
    var chart = $('#container').highcharts();
    chart.xAxis[0].update({
        lineColor: '#00ff00',           
        range: 20
    });     
});

$('#button_50').click(function() {
    var chart = $('#container').highcharts();
    chart.xAxis[0].update({
        lineColor: '#E22636',           
        range: 50
    });     
  });        
});

Answer 1

setExtremes() http://api.highcharts.com/highstock#xAxis.events.setExtremes, .

EDIT: : http://jsfiddle.net/wkBwW/16/