= RRDtool = You want to fetch the 15 minute average data for the last hour. You might try {{{ rrdtool fetch data.rrd AVERAGE -r 900 -s -1h }}} Then convert time epoch time to human readable {{{ #!sh [krit@mini tmp]$ date -d @1629298800 Wed 18 Aug 2021 10:00:00 PM +07 }}}