score:2

you can add two buttons and use css styles for positions them. you need to catch click event and use setextremes which allows to define range in xaxis.

http://api.highcharts.com/highcharts#axis.setextremes()

edit:

http://jsfiddle.net/q8bhz/

$('#button').click(function() {
    var chart = $('#container').highcharts();
    chart.xaxis[0].setextremes(0, 5);
});

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