Arms Index (TRIN)

Description

Arms Index, also known as The Trading Index (TRIN), is a breadth oscillator that aids in the measurement of internal market strength or weakness.

Chart: TRIN

How this indicator works

TRIN is a short-term trading tool that measures volatility in the stock market. TRIN represents the relationship between advancing and declining issues by measuring their volume flow. A rising TRIN depicts a weak market and a falling TRIN depicts a strong market. A moving average can be added to smooth the data.

Calculation

Advancing Issues / Declining Issues -------------------------------------------- Advancing Volume / Declining Volume

The TRIN will read under 1.0 when advancing stocks are the major source of volume and above 1.0 when declining stocks are the predominant source of volume flow in the market.

Technical analysis focuses on market action — specifically, volume and price. Technical analysis is only one approach to analyzing stocks. When considering which stocks to buy or sell, you should use the approach that you're most comfortable with. As with all your investments, you must make your own determination as to whether an investment in any particular security or securities is right for you based on your investment objectives, risk tolerance, and financial situation. Past performance is no guarantee of future results.

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