docs: function (point) {
  		// Find the polar plotX and plotY
  		var chart = this.chart,
  			xy = this.xAxis.postTranslate(point.rectPlotX, this.yAxis.len - point.plotHigh);
  		point.plotHighX = xy.x - chart.plotLeft;
  		point.plotHigh = xy.y - chart.plotTop;
  	}