TRIN: An All-Purpose Market Mood Indicator
TRIN, also referred to as theShort-Term Trading Index or the Arms Index (after its inventor, Richard W. Arms Jr.),was introduced in Barron’sby its inventor in 1967. A fuller discussion of the indicator is available in the 1989 book The Arms Index (TRIN Index): An Introduction to Volume Analysis, by Richard W. Arms.
TRIN is a popular indicator that many traders use to monitor forces associated with accumulation (buying) and distribution (selling) pressures in the stock market. It can be applied over very short periods of time, even for day-trading purposes, or for longer periods of time, as a measure of buying and selling pressures in the market. In my own experience, I have not found TRIN to be a precise ...
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