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As an example, suppose that at a particular point during the trading day, the data looked like this - advancing issues (1,500), declining issues (2000), advancing issues volume (300,000,000), and declining issues volume (800,000,000). By
plugging
the numbers into the above formula, TRIN
would be computed as follows
TRIN = (1500/2000) / (300,000,000/500,000,000) = 1.25
http://daytrading.about.com/cs/tradingtools/a/trin.htm