import mx.controls.Alert;
import mx.charts.events.ChartItemEvent;
import mx.collections.ArrayCollection;
[Bindable]
public var dataSet:ArrayCollection = new ArrayCollection([
{Month:"Jan", Expenses:1500},
{Month:"Feb", Expenses:200},
{Month:"Mar", Expenses:500}
]);
public function myHandler(e:ChartItemEvent):void {
Alert.show("Chart data was clicked");
}