Steve,Thank you so much for this detailed explanation.is helped me a lot.Thanks one more time.Fule -- View this message in context: http://rrd-mailinglists.937164.n2.nabble.com/what-is-Upper-Lower-Trend-and-95th-tp7580669p7580671.html Sent from the RRDtool Users Mailinglist mailing list archive at Nabble.com.