labelAngle: Number

Sets the angle of labels for the axisY stripline when labels are placed outside.

• Units in degrees
• Values can be positive or negative

var  chart =  new  CanvasJS.Chart("container", {
 .
 .
 axisY:{
	stripLines: [
		{
		 labelAngle: 90
		}
	]
   },
 .
 . 
});
chart.render();