Find data points

<?xml version="1.0"?>
<!-- charts/FindDataPoints.mxml -->
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml">
  <mx:Script><![CDATA[
     import mx.charts.HitData;
     import mx.collections.ArrayCollection;

     [Bindable]
     public var expenses:ArrayCollection = new ArrayCollection([
        {Month:"January", Profit:2000, Expenses:1500},
        {Month:"February", Profit:1000, Expenses:200},
        {Month:"March", Profit:1500, Expenses:500},
        {Month:"April", Profit:500, Expenses:300},
        {Month:"May", Profit:1000, Expenses:450},
        {Month:"June", Profit:2000, Expenses:500}]);

     public function handleMouseMove(e:MouseEvent):void {
        // Use coordinates to get HitData object of
        // current data point.
        var hda:Array =
            chart.findDataPoints(e.currentTarget.mouseX,
            e.currentTarget.mouseY);
        if (hda[0]) {
           ta.text = "Found data point " +
                hda[0].chartItem.index + " (x/y):" +
                Math.round(hda[0].x) + "," +
                Math.round(hda[0].y) + "\n";
           ta.text += "Expenses:" + hda[0].item.Expenses;
        } else {
           ta.text = "No data point found  (x/y):" +
                Math.round(e.currentTarget.mouseX) +
                "/" + Math.round(e.currentTarget.mouseY);
        }
     }
  ]]></mx:Script>
  <mx:Panel title="Plot Chart">
     <mx:PlotChart id="chart"
        mouseMove="handleMouseMove(event)"
        dataProvider="{expenses}"
        showDataTips="true"
        mouseSensitivity="5"
     >
        <mx:series>
           <mx:PlotSeries
                xField="Profit"
                yField="Expenses"
           />
        </mx:series>
     </mx:PlotChart>
  </mx:Panel>
  <mx:TextArea id="ta" width="300" height="50"/>
</mx:Application>