title: Negative values in the data not showing in highcharts linechart
body: <p>In my linecharts I had passed negative values in the data array, and those are not showing in the linecharts. What would be the problem.</p>
  
  <p>When I am creating the data array I am just casting the values into a float using parseFloat.</p>
  
  <p>If the data array is like this: </p>
  
  <pre><code>[-1.800000000,2.57,-3.72,7.82,-5.0]
  </code></pre>
  
  <p>The chart is only showing for positive values not for negative values like below.</p>
  
  <p><img src="https://i.stack.imgur.com/nO3SU.png" alt="enter image description here"></p>