OPEN-SOURCE SCRIPT
Relative Strength Spread
SPY vs IWM Relative Strength Spread Indicator
The SPY vs IWM Relative Strength Spread indicator measures leadership between large-cap and small-cap equities by comparing the percent performance of SPY (S&P 500) against IWM (Russell 2000) over a user-defined lookback period.
The indicator plots a zero-centered histogram in a separate pane, making relative strength shifts immediately visible.
How It Works
The indicator calculates the percent change of SPY and IWM over the same lookback window.
It then subtracts IWM’s percent change from SPY’s percent change.
The result is plotted as a histogram pinned to the 0% line.
This design removes long-term drift and ensures that:
Positive values indicate SPY is outperforming IWM
Negative values indicate IWM is outperforming SPY
How to Read the Histogram
Above Zero (Green Bars)
Large-cap stocks are leading → typically associated with risk-on stability and institutional flow into SPY-weighted names.
Below Zero (Red Bars)
Small-cap stocks are leading → often signals risk appetite expansion and speculative participation.
Crosses of the Zero Line
Mark potential leadership transitions between large caps and small caps.
Why This Indicator Is Useful
Identifies market regime shifts (risk-on vs risk-off behavior)
Confirms or filters trend strength in equities
Helps time rotations between large-cap and small-cap exposure
Works consistently across all timeframes
Because the calculation is based on percent change, the histogram remains normalized and comparable regardless of price level or timeframe.
Best Use Cases
As a market internals / breadth confirmation tool
As a bias filter for SPY, IWM, or index futures
To spot early leadership changes before price trends fully develop
The SPY vs IWM Relative Strength Spread indicator measures leadership between large-cap and small-cap equities by comparing the percent performance of SPY (S&P 500) against IWM (Russell 2000) over a user-defined lookback period.
The indicator plots a zero-centered histogram in a separate pane, making relative strength shifts immediately visible.
How It Works
The indicator calculates the percent change of SPY and IWM over the same lookback window.
It then subtracts IWM’s percent change from SPY’s percent change.
The result is plotted as a histogram pinned to the 0% line.
This design removes long-term drift and ensures that:
Positive values indicate SPY is outperforming IWM
Negative values indicate IWM is outperforming SPY
How to Read the Histogram
Above Zero (Green Bars)
Large-cap stocks are leading → typically associated with risk-on stability and institutional flow into SPY-weighted names.
Below Zero (Red Bars)
Small-cap stocks are leading → often signals risk appetite expansion and speculative participation.
Crosses of the Zero Line
Mark potential leadership transitions between large caps and small caps.
Why This Indicator Is Useful
Identifies market regime shifts (risk-on vs risk-off behavior)
Confirms or filters trend strength in equities
Helps time rotations between large-cap and small-cap exposure
Works consistently across all timeframes
Because the calculation is based on percent change, the histogram remains normalized and comparable regardless of price level or timeframe.
Best Use Cases
As a market internals / breadth confirmation tool
As a bias filter for SPY, IWM, or index futures
To spot early leadership changes before price trends fully develop
Script open-source
Nello spirito di TradingView, l'autore di questo script lo ha reso open source, in modo che i trader possano esaminarne e verificarne la funzionalità. Complimenti all'autore! Sebbene sia possibile utilizzarlo gratuitamente, ricordiamo che la ripubblicazione del codice è soggetta al nostro Regolamento.
Declinazione di responsabilità
Le informazioni e le pubblicazioni non sono intese come, e non costituiscono, consulenza o raccomandazioni finanziarie, di investimento, di trading o di altro tipo fornite o approvate da TradingView. Per ulteriori informazioni, consultare i Termini di utilizzo.
Script open-source
Nello spirito di TradingView, l'autore di questo script lo ha reso open source, in modo che i trader possano esaminarne e verificarne la funzionalità. Complimenti all'autore! Sebbene sia possibile utilizzarlo gratuitamente, ricordiamo che la ripubblicazione del codice è soggetta al nostro Regolamento.
Declinazione di responsabilità
Le informazioni e le pubblicazioni non sono intese come, e non costituiscono, consulenza o raccomandazioni finanziarie, di investimento, di trading o di altro tipo fornite o approvate da TradingView. Per ulteriori informazioni, consultare i Termini di utilizzo.