title: Highcharts: Not showing values, datetime type
body: <p>I'm trying to figure it out but I don't know exactly how to do it..</p>
  
  <p>This is my current demo code: <strong><a href="http://jsfiddle.net/cf88s6ky/" rel="nofollow noreferrer">http://jsfiddle.net/cf88s6ky/</a></strong></p>
  
  <p>This one works, but I don't know how: <strong><a href="http://jsfiddle.net/93Xcu/7/" rel="nofollow noreferrer">http://jsfiddle.net/93Xcu/7/</a></strong></p>
  
  <p>What I'm doing wrong?</p>
  
  <p>I don't know exactly how works this part:</p>
  
  <pre><code>  data: [
              [1369206795000, 1],
              [1369225421000, 3],
              [1369230934000, 2]
          ]
  </code></pre>
  
  <p><img src="https://i.stack.imgur.com/tfz7L.png" alt="enter image description here"></p>