title: Highcharts - only show tooltip when hovering directly on point
body: <p>The default experience for highcharts seems to be that the closest point to your cursor (horizontally) is in a hover state.  This means that a tooltip is triggered when you get more than halfway toward the next point in the line.  I want to have a tooltip trigger when I hover directly over a point, and then remain active until I hover directly over a different point. </p>
  
  <p>Here is a fiddle of the issue, with the corresponding code below: </p>
  
  <p><a href="http://jsfiddle.net/qNLu2/" rel="noreferrer">http://jsfiddle.net/qNLu2/</a></p>
  
  <pre><code>$(function () {
  $('#container').highcharts({
      chart: {
      },
      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]
      }, {
          data: [144.0, 176.0, 135.6, 148.5, 216.4, 194.1, 95.6, 54.4, 29.9, 71.5, 106.4, 129.2]
      }]
  });
  </code></pre>
  
  <p>});</p>