What you can do here
- Check participation beyond the headline index.
- Use breadth to separate strong rallies from fragile ones.
- Watch for deterioration before it becomes obvious on price charts.
How to Use Market Breadth
Breadth helps you see whether a market move is healthy, narrow, or losing support beneath the surface.
Related pages
These pages form a crawlable route cluster for fundamentals, technicals, the journal, and learning content.
Breadth tells you about participation
A market can rise even when only a few stocks are doing the heavy lifting. Breadth measures whether more stocks are joining the move or whether leadership is becoming more concentrated.
Healthy advances typically have wider participation, while weak advances often depend on a shrinking group of leaders.
Why traders care
Breadth can help traders avoid chasing moves that are already losing support. It can also help them stay with a trend when participation is still improving.
The best use of breadth is as a context filter. It improves timing and helps interpret price action more intelligently.