In my opinion, the slick way is to put formulas into cells that calculate
the LCL and UCL and graph them as part of the raw data. Then if you size
the chart or change the data, they are adjusted automatically.

You can always hide the rows or columns if you don't want to see the raw
data.

--
Regards,
Tom Ogilvy

"Lee" wrote in message
...
I need to create a horizontal lines on a line chart that indicates when
the
data is over (UCL) or under (LCL) a control limit. Is there a slick way
to
do this in VBA without actually putting the UCL or LCL values in cells.
The
upper control limits (UCL) and (LCL) values are generated from the data
statistically.