US Market Breadth Rhythm OscillatorThis tool is a market-breadth oscillator built on the core concepts of Fosback’s Relative Breadth , enhanced with proprietary calculations, cyclic smoothing, and adaptive rhythm-based bands. Instead of reacting to price, the oscillator measures the internal “calmness” or “loudness” of the U.S. stock market by analyzing the relative imbalance between advancing and declining issues.
High oscillator readings indicate a calm, quiet internal market—a state where daily breadth fluctuations are small and orderly. These calm conditions frequently appear near market tops.
Low oscillator readings reflect a loud, volatile internal market—a period with strong breadth imbalances in either direction. Such “noisy” conditions are typically associated with market lows.
Usage and interpretation
The oscillator also features dynamic cyclic bands that breathe with market rhythm. These shifting upper and lower bands help highlight potential turning points:
A drop down through the upper band may suggest a developing market top.
A rise up through the lower band may signal a positive shift in market dynamics that often precedes an upswing.
Overall, this tool helps visually identify calm/top conditions, loud/bottom conditions, and possible shifts in market trend by combining enhanced Fosback breadth analysis with adaptive cyclic calculations.
It can be used to visualize potential market extremes and market exhaustions on US main indices. So pick a main US stock market index as price chart and add the market breadth rhythm based on the selected market internals.
However, it is not meant as swing trading system on its own. It is an oscillator which allows to identify extreme market internals which are often in alignment with major changes in trend of the price index.
Examples:
The top key image shows the indicator on a 2h Dow Jones Index price chart during the upswing phase from April to December 2025. The following image showcases the indicator for a longer period from 2022 to 2025 on a daily chart of the Dow Jones Index:
Parameter:
Select the market breadth sources that should be used for the calculation. You can choose between the following breadth sources:
Dow Jones
Nasdaq
New York Stock Exchange
Composite
The Composite selection will create all 3 series and create a merged composite US Breadth Rhythm indicator as result.
The arrows on the price chart visualize directly on the price chart when the indicator crosses below or above the dynamic bands.
Recommended usage:
Open an Dow Jones, Nasdaq, Russel 2000 or New York Stock Exchange Index. Use 1 Day, 4h or 2h timeframe. Add the indicator and choose the market breadth for oscillator readings.
Note:
This oscillator is calculated entirely from market breadth metrics, not from the chart’s price. You can select NASDAQ, Dow Jones, or NYSE breadth (advancers/decliners) as the internal data source.
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