title: How to make mathematical chart with HighCharts?
body: <p><a href="https://i.stack.imgur.com/VgbyJ.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/VgbyJ.png" alt="Target chart"></a></p>
  
  <p><a href="https://i.stack.imgur.com/R36Qg.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/R36Qg.png" alt="HichCharts chart"></a></p>
  
  <p>Hi there, I'm doing a web project which aims to replace a back-end chart renderer with front-end chart renderer. The front-end charting library I'm using is HighCharts. The 1st image shows what the chart supposed to look, and the 2nd is the chart rendered by HighCharts based on same data. As you can see, at point 3 &amp; 4 (count from right to left), since their values are equal, the line between them are considered horizontal, which is different in image 1 as desired.</p>
  
  <p>Is there anyway we can use HighCharts to achieve the first image - like chart? Cheers.</p>