title: Adjust position of a line chart series symbol using echarts
body: <p>I have created chart in E-Chart.It has two vertical bars with two lines above them.
  I need to place the symbols at the intersection of bars and lines . It should be like first chart in the picture</p>
  
  <p>But in my chart the symbol position is placed on the xaxis value.please refer the second chart.
  Is there any possible way to change the position of symbols.</p>
  
  <p>Image link: <a href="https://i.stack.imgur.com/rh1Tc.jpg" rel="nofollow noreferrer">https://i.stack.imgur.com/rh1Tc.jpg</a></p>