[Solved]-Highcharts shared tooltip for line series and scatter plot not working-Highcharts

add this line of code:

highcharts.seriestypes.scatter.prototype.nosharedtooltip = false;

it disables hicharts default setting which disables scatter plots from being included in shared/split tooltips. this way you do not have to use spline like others suggest, which cant lead to problems such as tooltip following the spline line.

according highcharts api http://api.highcharts.com/highcharts#tooltip.shared tooltip shared works only for ordered data and not for pie, scatter, flags etc.

you could try this http://jsfiddle.net/8qt0d4h0/

the new highcharts can not shared tooltip in pie/scatter/flag, so you could handle the scatter as spline , and set the linewidth equal and set states hover equal 0 too.

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

        xaxis: {
            categories: ['jan', 'feb', 'mar', 'apr', 'may', 'jun', 'jul',
                                     'aug', 'sep', 'oct', 'nov', 'dec']
        },

        tooltip: {
            shared: true
        },

        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],
            type: 'spline',
            "linewidth": 0,
                        "marker": {
              "enabled": "true",
              "states": {
                "hover": {
                  "enabled": "true"
                }
              },
              "radius": 5
            },
          "states": {
            "hover": {
              "linewidthplus": 0
            }
          },
        }, {
            data: [216.4, 194.1, 95.6, 54.4, 29.9, 71.5, 106.4, 129.2, 144.0, 176.0, 135.6, 148.5]
        },{
            data: [210.4, 190.1, 90.6, 50.4, 20.9, 70.5, 105.4, 120.2, 140.0, 170.0, 130.6, 140.5]
        }]
    });
});