EvRTI 
The EvRTI function returns the time and date of the last data refresh.
Note
The last refresh is not the last time the data was updated in the database.
End of the note.
Syntax
EvRTI()
End of the code.
Example
The following example returns 11/2/2008 12:20:16 PM, if that was the last time the cell was refreshed.
=EVRTI()
End of the example.