- Summary
- A technical measure of how many stocks are advancing versus declining, showing an index’s underlying strength.
- The A-D Line, A-D Ratio, New Highs vs New Lows, McClellan Oscillator and TRIN measure different aspects of market breadth.
- Market breadth shows whether a market move has broad participation and can indicate underlying strength, weakness or divergence from an index.
- Investors can check market breadth using NSE advance-decline data and tools such as Chartink, StockEdge, Tickertape and TradingView.
What is market breadth?
The market breadth is a technical analysis concept that shows how widely a market move is supported by individual stocks. It compares advancing and declining stocks within an index or on an exchange.
Features of the market breadth index
Market breadth assesses market participation through the number of advancing and declining stocks, new highs and lows, and trading volume.
- Advancing and declining issues: The market breadth tracks the number of stocks rising or falling during a session. Comparing these figures shows whether market movement has broad participation.
- Recent highs and lows: By comparing the stocks reaching new 52-week highs with those hitting new 52-week lows, it helps to assess the underlying strength and momentum of the market.
- Advancing and declining volume: It compares trading volume in advancing and declining stocks. This adds volume-based context to the strength of buying and selling activity.
What does market breadth indicate?
Market breadth indicates the strength and direction of market participation by comparing the number of advancing and declining stocks.
A positive breadth (bullish), where more stocks rise than fall, suggests broad market strength. Negative breadth (bearish), where more stocks decline than rise, indicates wider weakness. It can also confirm or diverge from the direction of a market index.
Here is a Nifty 500 market breadth chart showing the number of advancing and declining stocks over time:
How to measure market breadth?
Market breadth can be measured using indicators that compare advancing and declining stocks, with some measures also incorporating trading volume and new highs or lows. Two commonly used measures are the Advance-Decline (A-D) Line and the Advance-Decline Ratio.
- Advance-Decline Line
The A-D Line is a cumulative measure of market breadth. It adds the daily difference between advancing and declining stocks to the previous A-D Line value.
It is calculated as,
A-D Line = Previous A-D Line + (Advancing Stocks − Declining Stocks)
A rising A-D Line indicates that more stocks are advancing over time, while a falling A-D Line indicates broader weakness.
- Advance-Decline Ratio
The A-D Ratio compares the number of advancing stocks with the number of declining stocks for a specific period.
Its formula is
A-D Ratio = Number of Advancing Stocks/Number of Declining Stocks
An A-D Ratio above 1 indicates more advancing than declining stocks, while a ratio below 1 indicates more declining stocks.
Types of Market Breadth Indicators
The market breadth indicators assess how widely stocks participate in a market move. They can show whether an index movement is supported by broad participation or driven by a smaller group of stocks.
| Indicator | What it measures | Bullish reading | Bearish reading |
| A-D Line | Cumulative difference between advancing and declining stocks | Rising A-D Line | Falling A-D Line |
| A-D Ratio | Advancing stocks relative to declining stocks | Above 1 | Below 1 |
| New Highs vs New Lows | Stocks making new 52-week highs versus new lows | More new highs | More new lows |
| McClellan Oscillator | Short-term momentum in net advances using EMAs | Positive or rising | Negative or falling |
| TRIN (Arms Index) | Advance-decline ratio relative to advance-decline volume | Below 1 | Above 1 |
Advance-Decline Line
The A-D Line is a cumulative measure of market breadth, which adds the daily difference between advancing and declining stocks to its previous value.
A-D Line = Previous A-D Line + (Advancing Stocks − Declining Stocks)
Advance-Decline Ratio
The ratio compares the number of advancing stocks with declining stocks during a specific period.
A-D Ratio = Advancing Stocks/Declining Stocks
New Highs vs New Lows
The indicator compares the number of stocks reaching new 52-week highs with those reaching new 52-week lows. More new highs indicate stronger breadth, while more new lows indicate weaker breadth.
New High-Low Difference = New Highs − New Lows
McClellan Oscillator
The McClellan Oscillator measures short-term market breadth momentum using the difference between the 19-day and 39-day exponential moving averages of net advances.
McClellan Oscillator = 19-day EMA of Net Advances − 39-day EMA of Net Advances
TRIN (Arms Index)
TRIN compares the advance-decline ratio with the advance-decline volume ratio to assess the balance of buying and selling pressure.
TRIN = (Advancing Stocks/Declining Stocks)/(Advancing Volume/Declining Volume)
Using Market Breadth in Trading
Market breadth can help identify potential reversals when an index continues rising but fewer stocks participate in the advance, indicating that buying support is narrowing.
- Confirming Trends
Market breadth helps to confirm the strength of an index trend by showing how many stocks are participating. It can be used alongside chart patterns to assess the strength of a market move.
- Spotting Reversals
Market breadth can warn of a potential trend reversal when fewer stocks participate in a market rise. The weakening breadth may signal that the uptrend is losing momentum if an index continues to climb while the number of advancing stocks falls. It is rather a warning sign, not a sell signal.
- Detecting Market Strength
It helps to detect buying strength even when an index moves sideways. If an index moves sideways while a large number of stocks advance, it signals broad underlying buying interest that may precede an upside breakout.
- Identifying Divergences
The market breadth divergence takes place when an index and a breadth indicator move in opposite directions. For instance, if an index reaches new highs while the A-D Line stays flat or falls, the divergence suggests that only fewer stocks are supporting the market advance.
Challenges of Market Breadth Analysis
While market breadth provides valuable insights into the market, it has certain limitations that should be considered when interpreting breadth indicators.
- Lagging Nature
Some breadth indicators use moving averages or cumulative values. As a result, they may give a signal after the market has already started moving. This can be a limitation during sudden market movements.
- Extreme Sentiment
Breadth can show very extreme readings during periods of strong buying or selling. For example, very negative breadth during a sharp market fall does not always mean that the fall will continue. The market may be close to a bottom.
- Overreliance
A breadth indicator should not be used alone to make trading decisions. Traders can also consider price movement, trading volume and other technical indicators before reaching a conclusion.
- Sector Imbalances
A broad index such as the Nifty 50 can be strongly influenced by a small number of sectors or large companies. If these stocks drive the index higher while most other stocks remain weak, the index movement may not reflect the broader market.
How to check market breadth in India
Investors can check market breadth in the Indian stock market by comparing advancing and declining stocks on the NSE or within a specific index.
- Check NSE breadth
The NSE provides advance-decline data showing the number of stocks that have risen and fallen. A higher number of advances indicates positive breadth, while more declines indicate negative breadth. Investors can use this data to check market breadth on NSE during NSE trading hours.
Here are NSE advance-decline data showing the number of advancing, declining and unchanged stocks:
- Check Nifty breadth
Market breadth can also be checked for indices such as the Nifty 50 and Nifty 500. Comparing the number of advancing and declining stocks within an index shows how widely its price movement is supported. For example, a rising Nifty 50 with more advancing stocks indicates broader participation in the rise.
Nifty 50 advance-decline chart showing advancing and declining stocks for market breadth analysis:
- Use market tools
Platforms such as Chartink, StockEdge, Tickertape and TradingView provide tools to track market breadth and related indicators. Depending on the platform, investors can view advance-decline data, new highs and lows, volume-based indicators and breadth indicators such as the A-D Line.
To check market breadth today, investors can compare the latest number of advancing and declining stocks and then review the breadth indicator for the relevant index or market.
Market breadth vs market depth
Market breadth measures how widely a market move is supported across stocks, while market depth measures the availability of buy and sell orders at different price levels for a security. Breadth focuses on participation across stocks, whereas depth focuses on the liquidity available in the order book.
| Market breadth | Market depth |
| Measures participation across multiple stocks | Measures buy and sell orders for a security |
| Uses advancing and declining stocks, new highs and lows, and volume | Uses the quantity of buy and sell orders at different price levels |
| Helps assess the strength of a market trend | Helps assess liquidity and potential price impact of trades |
| Used in market-wide technical analysis | Used mainly to understand trading and order-book conditions |
Conclusion
Market breadth helps investors to assess how widely stocks are participating in a market move. Indicators such as the A-D Line, A-D Ratio, McClellan Oscillator and TRIN can help assess market strength, confirm trends and identify divergences.
It matters because a rising index may not always reflect broad participation across the market, making breadth useful for understanding the strength behind price movements.
FAQs
You can check stock market breadth by comparing the number of advancing and declining stocks on an exchange or within an index. NSE provides advance-decline data for Indian markets, while platforms such as Chartink, StockEdge, Tickertape and TradingView provide additional breadth indicators.
Market breadth measures how widely stocks are participating in a market move, while market depth measures the quantity of buy and sell orders available at different price levels for a security. Breadth assesses market participation, whereas depth indicates the liquidity available in the order book.
Market breadth tells you how widely a market move is supported by individual stocks. More advancing stocks indicate broader participation in a rise, while more declining stocks indicate wider weakness. Breadth can also help confirm an index trend or identify divergence between the index and broader market participation.
The breadth of the market theory states that the strength of a market trend depends partly on how many stocks participate in the move. When a large number of stocks advance or decline together, the trend has broader participation. Breadth indicators help measure this participation using advancing and declining stocks.
Market breadth refers to the number of stocks participating in a market move, while market depth refers to the quantity of buy and sell orders available at different price levels for a security. Breadth helps assess market-wide participation, whereas depth helps assess the liquidity and potential price impact of trades.
DOM, or Depth of Market, is a real-time display of buy and sell orders at different price levels for a security. It shows the quantity of orders available at each level and helps traders assess the available liquidity and potential price impact of a trade.
A low market breadth means that fewer stocks are participating in a market move. For example, if an index rises while only a small number of stocks advance, the rise has narrow participation. This can indicate weaker underlying market strength and may warrant closer attention to the trend.
There is no single best market breadth indicator for every situation. The Advance-Decline Line, Advance-Decline Ratio, McClellan Oscillator, New Highs vs New Lows and TRIN measure different aspects of market participation. The appropriate indicator depends on whether you want to assess breadth, momentum, new highs and lows, or volume.