code: function (points, mouseEvent) {
  		var ret,
  			chart = this.chart,
  			inverted = chart.inverted,
  			plotTop = chart.plotTop,
  			plotX = 0,
  			plotY = 0,
  			yAxis;
  		
  		points = splat(points);
  		
  		// Pie uses a special tooltipPos
  		ret = points[0].tooltipPos;
  		
  		// When tooltip follows mouse, relate the position to the mouse
  		if (this.followPointer && mouseEvent) {
  			if (mouseEvent.chartX === UNDEFINED) {
  				mouseEvent = chart.pointer.normalize(mouseEvent);
  			}
  			ret = [
  				mouseEvent.chartX - chart.plotLeft,
  				mouseEvent.chartY - plotTop
  			];
  		}
  		// When shared, use the average position
  		if (!ret) {
  			each(points, function (point) {
  				yAxis = point.series.yAxis;
  				plotX += point.plotX;
  				plotY += (point.plotLow ? (point.plotLow + point.plotHigh) / 2 : point.plotY) +
  					(!inverted && yAxis ? yAxis.top - plotTop : 0); // #1151
  			});
  			
  			plotX /= points.length;
  			plotY /= points.length;
  			
  			ret = [
  				inverted ? chart.plotWidth - plotY : plotX,
  				this.shared && !inverted && points.length > 1 && mouseEvent ? 
  					mouseEvent.chartY - plotTop : // place shared tooltip next to the mouse (#424)
  					inverted ? chart.plotHeight - plotX : plotY
  			];
  		}
  
  		return map(ret, mathRound);
  	}
docs: Extendable method to get the anchor position of the tooltip
  from a point or set of points