Mr. Pawan Kumar Misra, Technical Strategy Consultant, Reliable Software, speaking at 5th Edition of Finbridge Expo in New Delhi.

What is 'Market Breadth Indicator' ?
A mathematical formula that uses advancing and declining issues to calculate the amount of participation in the movement of the stock market. By evaluating how many stocks are increasing or decreasing in price and how many trades investors are placing for these stocks, breadth indicators can show whether overall market sentiment is bullish (positive market breadth) or bearish (negative market breadth). Investors can also use breadth indicators to evaluate the behavior of a particular industry or sector, or to analyze the magnitude of a rally or retreat.
Source: Investopedia