title: Does Highcharts have a "trend line" feature?
body: <p>Basically, I'm trying to have Highcharts automatically draw a straight line going from the first data point to the last, so that I can see the "overall trend" more easily.</p>
  
  <p>I believe this is called a "trend line" or something, but I have not found anything in the documentation related to that. It is very possible that it still has this feature, however. Does it?</p>