[amibroker] H=L and V=0

["Al Venosa" <advenosa@xxxxxxxxxxxx>]

Hi, everyone:
 
Tonight, I thought I'd do a quickie exploration of a watchlist containing 
almost 800 stocks (range setting on all quotations). I was interested in finding 
out how many times the high was equal to the low or the volume equaled 0. I used 
the following exploration:
Buy=Sell=Short=Cover=<FONT color=#ff6820 
size=2>0;Error = H==L<FONT 
face="Microsoft Sans Serif" size=2> OR V==<FONT 
face="Microsoft Sans Serif" color=#ff6820 size=2>0<FONT 
face="Microsoft Sans Serif" size=2>;<FONT color=#0000ff 
size=2>AddColumn(H,<FONT color=#ff00ff 
size=2>"H",1.2<FONT 
size=2>);AddColumn<FONT 
size=2>(L,"L",<FONT 
color=#ff6820 size=2>1.2);<FONT 
face="Microsoft Sans Serif" color=#0000ff size=2>AddColumn<FONT 
face="Microsoft Sans Serif" size=2>(V,<FONT face="Microsoft Sans Serif" 
color=#ff00ff size=2>"V"<FONT face="Microsoft Sans Serif" 
size=2>,<FONT face="Microsoft Sans Serif" color=#ff6820 
size=2>1);<FONT 
color=#0000ff size=2>AddColumn(Error,<FONT 
color=#ff00ff size=2>"Bad Price Patterns",<FONT 
color=#ff6820 size=2>1);<FONT 
face="Microsoft Sans Serif" size=2>Filter=Error><FONT 
face="Microsoft Sans Serif" color=#ff6820 size=2>0<FONT 
face="Microsoft Sans Serif" size=2>;
 
To my surprise, I found over 13,000 instances of H==L and almost 2,700 
instances of V==0. On the days when V==0, the H and L were also equal. So, those 
days were truly bad data (or non-trade) days. However, in the other 10,000+ 
instances when H==L, there was legitimate volume, sometimes high volume. What 
does it mean when the price bars are all equal (O=H=L=C), yet volume was finite? 

 
Al Venosa
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