| MAR 1992
The Trin-5 by Jerry Favors
The TRIN-5 by Jerry Favors Whether you know it as the trading index (TRIN) or the Arms index, this particular indicator has inspired variations ranging from an issue/volume-weighted long-term index to this, a short-term trading indicator based on a five-day sum of TRIN. Newsletter publisher Jerry Favors explains. Most traders are familiar with the trading index (TRIN), which was originally devised by Richard Arms. (For obvious reasons, it is also referred to as the Arms index.) Its premise is simple enough: in order to compute the trading index each day, divide the ratio of advancing issues to the number of declining issues by the ratio of advancing volume to declining volume. The data necessary to compute TRIN can be found every day in The Wall Street Journal , or you can call your broker and get the closing TRIN reading for the day. If you have access to cable television, CNBC shows the closing TRIN reading on its tape at the end of each trading day. VARIATIONS ON A THEME Most analysts use a 10-day moving average of TRIN as an indicator. The 10-day TRIN reaches oversold when it rises above 1.00, while it reaches overbought when it falls below 0.80. The 10-day TRIN has a very impressive record at market bottoms but is not nearly as accurate at market tops. My favorite method of using TRIN data is based on a version from W.G. Bretz's Juncture Recognition in the Stock Market. ...
by Jerry Favors
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