The comparison of a stock's price performance against a benchmark index or the broader market — a measure of whether a stock is leading or lagging the market.
Methodology reference · NSE context
Definition
Relative Strength (RS) measures a stock's price change relative to the broader NSE market over a specified period, typically 12 months. Originating from the work of William O'Neil and refined by Mark Minervini in his SEPA methodology, RS identifies which equities are demonstrating superior price performance. For NSE position traders, RS provides a quantitative filter to focus on securities that are leading the market in price appreciation, not lagging. It is a purely technical parameter, calculated from closing prices, and does not incorporate any fundamental data such as earnings or sales.
Relative Strength compares leadership against the broader market; RSI is a self-referential momentum oscillator and answers a different question.
For the NSE position trader, Relative Strength serves as a compass for capital deployment. When the broader Nifty 50 or Bank Nifty indices are trending, RS highlights those individual equities that are outperforming the benchmark. A stock with high RS is not merely rising; it is rising faster than its peers, indicating strong institutional accumulation. This metric allows a trader to align with the market's strongest price performers, a core tenet of methodology-driven position trading.
A common misconception among serious students is that high Relative Strength implies a stock is 'overbought' or due for a correction. In reality, RS is a measure of relative price leadership, not absolute valuation. A stock can sustain a high RS rating for many months while continuing to outperform. The error is to treat RS as a contrarian indicator; instead, it should be viewed as confirmation of ongoing institutional demand. Position traders who ignore RS often find themselves holding laggards while the market's true leaders advance without them.
Relative Strength for NSE stocks is calculated by dividing a stock's percentage price change over the trailing 12 months by the percentage change of the Nifty 500 index over the same period. This ratio is then ranked against all other NSE equities to produce a percentile score from 1 to 99. A score of 99 means the stock has outperformed 99% of all NSE stocks in price performance. This calculation is purely technical and uses only closing price data, not earnings or sales figures.
A stock with low Relative Strength is, by definition, underperforming the broader NSE market. While it is possible for a laggard to reverse and become a leader, the probability is significantly lower. Serious position traders using a methodology-first approach typically require an RS Rating of at least 70 to 80 before considering capital deployment. Attempting to catch a turning point in a low-RS stock is speculative and not aligned with the principle of trading in the direction of the strongest price structure.
Methodology note:
This glossary page summarises technical-analysis concepts in an NSE research context.
It is educational and analytical content, not investment advice or a stock recommendation.