public override void  OnMouseDown (MouseEventArgs mouseevent)
{
  Point2D mousepos = new Point2D();
  mousepos.SetLocation(mouseevent.X, mouseevent.Y); 
  base.OnMouseDown(mouseevent);
  
  ChartPlot selectedPlot =  (ChartPlot) GetSelectedPlotObj();
  if (selectedPlot != null)
  {
           .
           . // Original code, leave in place
           .

  } 
 else
{
	Point2D physcoord = currentInstance.pTransform0.ConvertCoord(PHYS_POS, mousepos, DEV_POS);
	stockpanel.SetChartObjScale(currentInstance.pTransform0);
	stockpanel.SetLocation( mousepos, ChartObj.DEV_POS);
	// Looking to the original arrays, because we just have the selectedindex, 

	ChartCalendar x =  new ChartCalendar();
	x.SetCalendarMsecs((long) physcoord.X);

	marker = new Marker(currentInstance.pTransform0,ChartObj.MARKER_VLINE,x.GetCalendarMsecs(),0,1,ChartObj.PHYS_POS);
	TimeLabel timelabel = new TimeLabel(currentInstance.pTransform0, x, ChartObj.TIMEDATEFORMAT_24HMS);
					
	stockpanel.SetTextString(timelabel.GetTextString());
	stockpanel.SetChartObjEnable(ChartObj.OBJECT_ENABLE);
   //	Graphics g2 = GetToolTipGraphics();
	Graphics g2 = (Graphics) currentInstance.CreateGraphics();

	// Precalculates the text bounding box so that the size is
	// known before it is drawn        
	stockpanel.PreCalcTextBoundingBox(g2); 
	Rectangle2D boundingbox = stockpanel.GetTextBox();
	// Reposition tooltip text box if top of box near top of graph window
	// You can do the same thing for all four sides of the graph window
	if (  (mousepos.GetY() - boundingbox.GetHeight()) < 1)
	{
		mousepos.SetLocation(mousepos.GetX(), mousepos.GetY() + boundingbox.GetHeight());
		stockpanel.SetLocation( mousepos, ChartObj.DEV_POS);
	}   
	// Draws the tooltip text panel to the chart graphics context  
	stockpanel.SetTextNudge(10, -10);
	stockpanel.Draw(g2); 
	marker.Draw(g2);
	if (g2 != null)
		g2.Dispose();
}