title: Adding flags to Highstock chart (highcharts) with JavaScript
body: <p>I've been working on this demo chart <a href="http://jsfiddle.net/hcharge/G7rsh/" rel="nofollow">http://jsfiddle.net/hcharge/G7rsh/</a> and I'm struggling to add flags to the x axis.</p>
  
  <p>In the examples on the highchart webpage they use UTC to locate the flag, however the series on this chart are plotted in a different way, using this format [1330560000000,32.29]</p>
  
  <p>Would anybody have an answer? I'm not sure if this is specific to JavaScript or Highcharts but thought it would be worthwhile posting on here.</p>
  
  <p>I've tried adding </p>
  
  <p><code>series: [{
                  type: 'flags',
                  data : [{'text':'Flag Set','title':'E','x':1330560000000} ],
                  width: 16
              }],</code></p>
  
  <p>to the javascript but this doesn't seem to do anything, any help would be amazing, thanks</p>