Private Sub Chart_BeforeDoubleClick(ByVal ElementID As Long, ByVal Arg1 As Long, ByVal Arg2 As Long, Cancel As Boolean)
If ElementID = xlSeries And Arg1 = 2 Then
Cancel = True
If Arg2 < 1 Then MsgBox "Recommencez...", , "Double-clic": Exit Sub 'sécurité
Application.Goto Sheets("Nouveau Chiffrage").Cells(Arg2, 1).Resize(, 2)
End If
End Sub