title: Using amCharts, how can I recreate thresholds behind bars as shown below?
body: <p><a href="https://i.stack.imgur.com/CKOAa.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/CKOAa.png" alt="The chart I&#39;m trying to create"></a></p>
  
  <p>I've been given the image above as an example of what the final chart should look like, but I'm having difficulty creating it. </p>
  
  <p>We have to use amCharts due to the technology we're using, and I've got the columns stacked and coloured as I want, but I can't find a way to add the thresholds (shown in light green/blue/yellow). It'd also be nice to display it on a logarithmic scale as per the top of the image, but I'm not quite so bothered about that.</p>
  
  <p>Any help appreciated.</p>
  
  <p>Update:</p>
  
  <p>Thanks to the spectacular help of xorspark I've managed to get it as I want it, even though I ended up not using logarithms.</p>
  
  <p>The <code>code</code> is at <a href="https://codepen.io/dangerworm/pen/mByGqL" rel="nofollow noreferrer">https://codepen.io/dangerworm/pen/mByGqL</a> for those interested. <a href="https://i.stack.imgur.com/xbjOD.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/xbjOD.png" alt="A much better version nearly matching the original image"></a> </p>