Добавьте событие, используя jQuery, как показано ниже ...
var chart = new Highcharts.Chart({
chart: {
renderTo: 'container',
defaultSeriesType: 'pie'
},
legend: {
enabled: true
},
xAxis: {
categories: ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec']
},
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] ,
showInLegend: true
}]
});
// Apply events to text elements (SVG) and spans within the legend (VML + modern browsers with useHTML option).
$('.highcharts-legend text, .highcharts-legend span').each(function(index, element) {
$(element).hover(function() {
chart.tooltip.refresh(chart.series[0].data[index]);
},function() {
chart.tooltip.hide();
})
});
http://jsfiddle.net/highcharts/5V33F/