title: How can I draw a circle on highlight point in line chart?
body: <p>I'm using mpchart to draw my charts.I wanted to increase the circle size of intersection point of highlighter and line dataset. How can I achieve this?<a href="https://i.stack.imgur.com/IsWG9.jpg" rel="noreferrer"><img src="https://i.stack.imgur.com/IsWG9.jpg" alt="enter image description here"></a></p>
  
  <p>I read somewhere that we can add another dataset with highlighted point and increase its circle size. Is that really a good approach if my highlighter will be dragged back and forth and I'll have to update the new dataset very frequently?</p>