Reverse Repo Correlation

Reverse Repo Correlation Indicator

This TradingView indicator calculates the correlation between the current stock's close price and the value of the Reverse Repo Rate (`RRPONTSYD`). It uses the Pearson correlation coefficient to measure the strength and direction of the relationship.

Inputs

- **Correlation Length**: The number of bars used to calculate the correlation.
- **Background Transparency**: The transparency level (0-100) for the background color indicating positive or negative correlation.

### How it works

1. The indicator retrieves the close price of the current stock and assigns it to the `stockClose` variable.
2. The **Correlation Length** input determines the number of bars used to calculate the correlation.
3. The `pearson_corr` function calculates the Pearson correlation between the `stockClose` and `rrpontsydValue` variables over the specified length.
4. The `rrpontsydValue` is retrieved using the `request.economic` function, which fetches the Reverse Repo Rate value (`RRPONTSYD`) for the "US" economic calendar.
5. The correlation value is plotted on the chart as a line, with positive correlations displayed in green and negative correlations in red.
6. The **Background Transparency** input determines the transparency level of the background color, which changes based on the correlation value. Positive correlations have a green background, while negative correlations have a red background.

Adjust the `correlationLength` and `transparency` inputs as needed.