title: Highcharts tickinterval set to one minute shows only one date
body: <p>I have a highcharts graph of speed(y axis) and time( x axis), each second posts a new speed, which means in an hour I will have 3600 data point, and that is a lot. I found out about <code>tickInterval</code> and the ability to shorten the amount of time drawn on the x axes, but as soon as I set it the ticks labels disappear and it shows only the first minute label </p>
  
  <p>Here are two graph comparison of how it look like with <code>tickInterval</code> and without</p>
  
  <p><strong>without <code>tickInterval</code></strong>:</p>
  
  <p><a href="https://i.stack.imgur.com/8VFoj.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/8VFoj.png" alt="enter image description here"></a></p>
  
  <p><strong>With <code>tickInterval</code>:</strong></p>
  
  <p>I would have expected to see a tick label on x axis every minute but instead I see only this ? hmm ?</p>
  
  <p><a href="https://i.stack.imgur.com/BrXDM.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/BrXDM.png" alt="enter image description here"></a></p>
  
  <p>here is my code with less data points than I have:</p>
  
  <p><a href="http://jsfiddle.net/cyc89zop/1/" rel="nofollow noreferrer">http://jsfiddle.net/cyc89zop/1/</a></p>
  
  <p>How can I fix this problem ?</p>