Breadth measures how many assets are participating in a move. An index can reach new highs while most of its members are falling, which is a narrow and fragile advance. A healthy rally includes many assets.
The Market Pulse gauge is the average score of everything we track in a class. A score above 60 means most assets have healthy structure, trend and momentum together. Below 30 means most are in trouble.
The home page also counts how many assets trade above their 50-day average and how many have a bullish rule on. Rising breadth with a rising price is the strongest combination. Falling breadth with a rising price is a warning.