add answer to grepper
// Highcharts ==> Making always visible tooltip pointing to latest values
// add this to load : functions settings
chart_one.tooltip.refresh(chart_one.series[0].points[19]);
// Highcharts ==> following is the sample which shows where to add the changes
chart: {
type: 'spline',
backgroundColor: {
linearGradient: [0, 0, 500, 500],
stops: [
[0, 'rgb(255, 255, 255)'],
[1, 'rgb(200, 200, 255)']
]
},
animation: Highcharts.svg, // don't animate in old IE
marginRight: 10,
events: {
load: function () {
// set up the updating of the chart each second
var series = this.series[0];
setInterval(function () {
var x = (new Date()).getTime(), // current time
y = a;
series.addPoint([x, y], true, true);
//for always on display value in tootip
// points[0] shows which point in the chart to show in tooltip
chart_one.tooltip.refresh(chart_one.series[0].points[0]);
//console.log("this chart "+ chart_one.series[0].points[0]);
}, 3000);
}
}
}