Also called the TRIN index, this indicator is a ratio of the average volume of declining stocks divided by the average volume of advancing stocks. Reading below 1.0 indicates more volume in rising stocks. A reading above 1.0 indicates more volume in declining stocks. A 10 day average of the arms index over 1.20 is oversold and under .70 is overbought.

This is an indicator which relies on advances and declines in the stock market. A reading above 1 or in some software 100, is bearish. A number below 1 or in some software 100, is bullish. The higher the number the more bearish. The lower the number, the more bullish. In the normal course of trading, this number is usually between about 40 and 60. Very high or very low numbers occur infrequently. The formula is: ((# of advancing issues/ # of declining issues)/ (Total up volume/ Total down volume)).

Advance/decline indicator (advancers/decliners)X(Up/Down volume).

Also known as TRading INdex (TRIN): = # advancing issues / # declining issues Total up volume/total down volume An advance/decline market indicator. Less than 1.0 indicates bullish demand, while above 1.0 is bearish. The index often is smoothed with a simple moving average.

Also called trading index (TRIN), a market indicator used in technical analysis taken by dividing the ratio of advancing and declining issues by the ratio of up and down volume.

A market indicator showing the ratio between the average volume of declining stocks and the average volume of advancing stocks. Generally, a rising TRading INdex is bearish and a falling TRIN is bullish. See ChartSchool article on Arms Index.