NSE Bank Nifty - Arms Index (TRIN)

NSE Bank Nifty – Arms Index TRIN).
How it works?
By default, it considers all the constituents of Bank Nifty for calculation on TRIN
Input configuration parameters:
1. Advance/Decline Formula:
a. Based on same day open and close price
b. Based on todays close compared to previous day close

2. Plots:
a. TRIN
b. Simple moving average of TRIN
c. Advance/Decline Price line
d. Advance/Decline Volume line

About Arms Index (TRIN)
The Arms Index , also called the Short-Term Trading Index (TRIN) is a technical analysis indicator that compares the number of advancing and declining stocks (AD Ratio) to advancing and declining volume (AD volume ). It is used to gauge market sentiment. Richard W. Arms, Jr. invented it in 1967, and it measures the relationship between market supply and demand . It serves as a predictor of future price movements in the market, primarily on an intraday basis. It does this by generating overbought and oversold levels, which indicate when the index (and the majority of stocks in it) will change direction.
• If AD Volume creates a higher ratio than the AD Ratio, TRIN will be below one.
• If AD Volume has a lower ratio than AD Ratio, TRIN will be above one.
• A TRIN reading below one typically accompanies a strong price advance, since the strong volume in the rising stocks helps fuel the rally.
• A TRIN reading above one typically accompanies a strong price decline, since the strong volume in the decliners helps fuel the selloff.
• The Arms Index moves opposite the price trajectory of the Index. As discussed above, a strong price rally will see TRIN move to lower levels. A falling index will see TRIN push higher.


The Formula for Arms Index (TRIN) is:
Stock Ratio = Advancing stocks / Declining Stocks
Volume Ratio = Volume of Advancing stocks / Volume Declining Stocks
TRIN = Stock Ratio / Volume Ratio

What Does the Arms Index (TRIN) Tell You?
The Arms index seeks to provide a more dynamic explanation of overall movements in the composite value of stock exchanges, by analyzing the strength and breadth of these movements.
Neutral State: An index value of 1.0 indicates that the ratio of AD Volume is equal to the AD Ratio. The market is said to be in a neutral state when the index equals 1.0, since the up volume is evenly distributed over the advancing issues and the down volume is evenly distributed over the declining issues.
Bullish State: Many analysts believe that the Arms Index provides a bullish signal when it's less than 1.0, since there's greater volume in the average up stock than the average down stock.
Bearish State: On the other hand, a reading of greater than 1.0 is typically seen as a bearish signal, since there's greater volume in the average down stock than the average up stock.
The farther away from 1.00 the Arms Index value is, the greater the contrast between buying and selling on that day. A value that exceeds 3.00 indicates an oversold market and that bearish sentiment is too dramatic. This could mean an upward reversal in prices/index is coming.
Conversely, a TRIN value that dips below 0.50 may indicate an overbought market and that bullish sentiment is overheating.
Traders look not only at the value of the indicator but also at how it changes throughout the day. They look for extremes in the index value for signs that the market may soon change directions.

Limitations of Using the Arms Index (TRIN)
Here are two examples of instances where problems may occur:
• Suppose that a very bullish day occurs where there are twice as many advancing issues as declining issues and twice as much advancing volume as declining volume . Despite the very bullish trading, the Arms Index would yield only a neutral value of (2/1)/(2/1) = 1.0, suggesting that the index's reading may not be entirely accurate.
• Suppose that another bullish scenario occurs where there are three times as many advancing issues as declining issues and twice as much advancing volume than declining volume . In this case, the Arms Index would actually yield a bearish (3/1)/(2/1) = 1.5 reading, again suggesting an inaccuracy.
Source: www.investopedia.com