RSI Indicator — Live Relative Strength Index for Any Stock

Search any NSE stock to see its live 14-period RSI, the overbought/oversold zone, an interactive price chart and the company profile — all in one place.

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What is the RSI (Relative Strength Index)?

The Relative Strength Index (RSI) is a momentum oscillator developed by J. Welles Wilder that measures the speed and magnitude of a stock’s recent price changes on a scale of 0 to 100. It answers a simple question: after a run of up or down days, is the move getting stretched? The most common setting is the 14-period RSI, which is what this tool computes from one year of daily closing prices.

How to read every RSI value

RSI readingZoneWhat it means
70 – 100OverboughtBuying has been strong and fast — the stock may be due for a pause or pullback.
50 – 70BullishMomentum favours buyers; above 50 is generally an uptrend bias.
30 – 50BearishMomentum favours sellers; below 50 is generally a downtrend bias.
0 – 30OversoldSelling has been heavy — the stock may be due for a bounce or reversal.

The 50 line matters most

RSI above 50 means average gains outweigh average losses over the period (bullish momentum); below 50 is the opposite. Overbought (70+) and oversold (30−) flag exhaustion, not automatic buy/sell orders.

How traders use RSI

Overbought / oversold: RSI above 70 warns a rally is stretched; below 30 warns a fall is stretched — often used to time exits and bounces.
Trend confirmation: in a healthy uptrend RSI tends to hold above 40–50; in a downtrend it caps near 50–60.
Divergence: if price makes a new high but RSI makes a lower high (bearish divergence), momentum is fading — a classic reversal warning.
Failure swings: RSI turning up from oversold without a new low can precede a rally.

RSI is a guide, not a signal to trade blindly

A stock can stay overbought for weeks in a strong trend. Combine RSI with trend (moving averages), MACD and support/resistance before acting.

Frequently Asked Questions

There is no single “buy” number. Many traders watch for RSI rising back above 30 from oversold as a bounce signal, or holding above 50 to confirm an uptrend. RSI above 70 (overbought) is usually a caution, not a buy. Always combine RSI with the trend and support levels.

The “14” is the look-back window — the RSI is calculated from the average gains and losses over the last 14 trading days. It is the default Wilder setting and the most widely used; shorter periods (like 9) are more sensitive, longer ones (like 21) are smoother.

No. RSI above 70 means momentum is strong and possibly stretched, but in a powerful uptrend a stock can remain overbought for a long time. Treat 70+ as a warning to tighten risk, not an automatic sell.

Divergence is when price and RSI disagree. If price makes a higher high but RSI makes a lower high, momentum is weakening (bearish divergence); if price makes a lower low but RSI makes a higher low, selling is fading (bullish divergence). Divergences often precede reversals.

We fetch one year of daily closing prices for the searched stock and compute the standard 14-period RSI client-side, so the value updates the moment you search a different stock.

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