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The index you refer to used to be called TRIN. It was created by Richard
"Dick" Arms. The Arms Index. It is listed in the Wall St. Journal in Section
C, under Stock Market Data Bank, Diaries just above block trades. It reads
closing Arms (trin). It is calculated as follows: (A/D) / (AV/DV) where
A = Advances; D = Declines; AV = advancing volume; and DV = declining
volume. See Norman Fosback's book STOCK MARKET LOGIC, p132. The index
measures the concentration of volume in advancing and decling stocks.
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