score:2

Accepted answer

to change tooltip display you could add more info per data point and later access it and set it in tooltip's formatter.

example: https://jsfiddle.net/woo70ers/

it might be easier to have all extra info in another array - easier too loop, whatever the additional into is.

simple example: http://jsfiddle.net/am5ynolg/

    tooltip: {
      formatter: function() {
        var ret = 'x: ' + this.x + ', y: ' + this.y;
        highcharts.each(this.point.extrafortooltip, function(info) {
          ret += '<br/>' + info[0] + ': ' + info[1];
        });
        return ret;
      }
    },
    series: [{
      data: [
        [0, 1, [['opt1',123],['opt2','nice']] ],
        [1, 2, [['opt2','bueno'],['opt3','esp_#42']] ]
      ],
      keys: ['x', 'y', 'extrafortooltip']
    }]

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