Instant RSI (IRSI)

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Instant RSI is tailored for users seeking an effective RSI indicator for charts with limited historical data, such as new symbols or very high time frame charts. Its distinctiveness lies in employing a Chebyshev filter, an innovative approach that allows the RSI to initiate calculations with just two data points. The Chebyshev filter, traditionally used in signal processing, helps in smoothing data while minimizing lag, a critical aspect in fast-moving financial markets.

Key Features:

Chebyshev Filter Integration: The Chebyshev filter is fine-tuned to mimic a 14-period RMA's behavior, enhancing the RSI's responsiveness and accuracy with minimal data.
Customizable RSI and MA Settings: Users can modify the RSI's source, length, ripple effect, and style. An optional moving average overlay, also based on Chebyshev filtering, tuned to mimic an EMA set to 14.
Divergence Detection: I have also included the ability to adjust the divergence settings to allow for more flexibility over the built in RSI.
The script operates by applying the Chebyshev filter to the price movement's up and down components, forming the basis of the RSI calculation. When the moving average feature is activated, it further processes the RSI value through the Chebyshev filter for additional smoothing. This dual application of the Chebyshev filter is central to the script's design, offering a unique solution for situations where traditional RSI calculations might be less reliable due to data scarcity.

The divergence detection feature enhances the script's utility by signaling potential trend reversals, critical for strategic decision-making in trading. These features are visually represented on the chart, ensuring that users can easily interpret and react to the indicators.

In general this indicator should produce the exact same output as the built in RSI. This indicator is specifically designed to be used in conditions where the built in RSI will not work due to limited data.

In summary, the "Instant RSI" script is a practical option for those dealing with limited data scenarios, offering a unique blend of Chebyshev filter application for more responsive market analysis.