code: function () {
  		var series = this;
  
  		Series.prototype.translate.apply(series);
  
  		each(series.data, function (point) {
  			point.shapeType = 'circle';
  			point.shapeArgs = {
  				x: point.plotX,
  				y: point.plotY,
  				r: series.chart.options.tooltip.snap
  			};
  		});
  	}
docs: Extend the base Series' translate method by adding shape type and
  arguments for the point trackers