markerType: String

Sets marker type to be rendered at each dataPoint. If mentioned at dataSeries, markers set here will take precedence.

Default: “circle”
Options: “circle”, “square”, “cross”, “triangle”
Notes
  • To disable marker set markerType to “none”.
  • Markers can be used in All line charts, area charts, scatter chart and bubble Chart. 
var  chart =  new  CanvasJS.Chart("container",
{
 .
 .
  data:[ {
   dataPoints: [
    {x: 10 , y: 50 , markerType: "square"},

   ],

  },
 ]
 .
 .
});
chart.render();
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