@twin, @gautamlaungani if you are familiar with Excel VBA macros you can try to do it via OLE (you should already have one instance of AmiBroker open with a chart)
(put this sample code in the VBA "Sheet" section):
Sub AB_UpdateTicker(ticker)
Dim oAB, oAW, oAD
' create AmiBroker object to update the ticker of the active document
Set oAB = CreateObject("Broker.Application")
oAB.Visible = True
Set oAD = oAB.ActiveDocument
Set oAW = oAB.ActiveWindow
oAD.Name = ticker
End Sub
Private Sub Worksheet_BeforeDoubleClick(ByVal Target As Range, Cancel As Boolean)
Cancel = True
AB_UpdateTicker (Target)
End Sub
This quick example will invoke the macro with a double-click on a cell where you will have tickers in Excel (modifiy it as needed).