Sorry. I remembered after I sent my reply that I was in
the Worksheet Functions group.
I'm not sure of your exact objective, but I'm going to
take a guess that this is what you want, and then you can
tinker with it. Assuming that the always-updating value is
in A1, setup two columns for entering the value and the
time of the value. Let's use Column C and D. So in C1 put
Time (or something similar) and in D1 put a title for the
value.
To enter the code, go to the workbook where the value is
being entered and click Alt+F11. This will take you to the
VB Editor. You should see a blank white screen amid all of
the windows. (If you don't then click F7 to bring it up.)
This is where your code will be placed.
In that VB Editor screen, there is a small window that
shows all of the open projects. It usually
says 'VBAProject' in it's banner. One of those projects is
your workbook name. Look for that workbook and then find
the sheet name. Double-click the sheet name to bring up
the code page for that sheet. Copy and paste this code
into that code page:
Private Sub Worksheet_Calculate()
Application.EnableEvents = False
ActiveSheet.Range("C65536").End(xlUp).Offset(1,
0).Value = Time
'You could also replace 'Time' with 'Now' to get
the date and time stamp
ActiveSheet.Range("C65536").End(xlUp).Offset(0,
1).Value = ActiveSheet.Range("A1").Value
Application.EnableEvents = True
End Sub
This code will run whenever any cell in the sheet requires
the sheet to be calculated. It will then put the value of
A1 in the list in column D and the time next to it in
Column C. Then you can use columns c and d to make your
chart.
tod