MetaStock -> Tools -> Indicator Builder -> New
Copy and paste indicator formula below.


=========
Bar Stats
=========
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{ Data bar statistics v1.0 }
{ Display in own window, then Zoom & Reset }
{ Irregular yearly data bar count indicates
   missing data and/or illiquid chart }
{ ©Copyright 2005 Jose Silva
  For personal use only
  http://www.metastocktools.com }

{ User inputs }
display:=Input("Count:  [1]Year's bars,  [2]Years,  [3]Bars",1,3,1);
type:=Input("Stats:  [1]Individual years',  [2]Avg/Total",1,2,1);

{ First year of loaded chart data }
year1:=ValueWhen(1,Cum(1)=1,Year());
year1flag:=Year()=year1;

{ Yearly bar stats }
yStart:=Year()<>Ref(Year(),-1);
yearStart:=yStart OR Cum(IsDefined(yStart))=1;
yearCount:=Cum(yearStart)-1;
yearBars:=BarsSince(yearStart)+1+year1flag;
YearStats:=If(display=1,yearBars,
 If(display=2,yearCount,Cum(1)));

{ Total/Avg bar stats }
barCount:=LastValue(Cum(1));
yearCount:=LastValue(Year())-year1;
yearlyAvgBars:=Int(barCount/yearCount+.5);
TotalStats:=If(display=1,yearlyAvgBars,
 If(display=2,yearCount,barCount));

{ Plot in own window below price chart }
If(type=1,YearStats,TotalStats)

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