moving average
noun[C]
ukusanaveragethat iscalculatedby using theaverageof severalperiodsoftimeup to thepresent. Amovingaveragechangesregularly, with theearliestamountbeingreplacedwith theamountbasedon the mostrecentdata:
Month-by-monthfiguresarenotoriouslyvolatile,whereasamovingaveragesmoothsout theeffectsof thebusinesscycle.
a four-week/three-month/10-year, etc. moving averageVolumes wereheavy,reaching4.4mshares,comparedwith the 15-daymovingaverageof 2.6m.