ADVDEC.US OSCILLATOR

This Pine Script implements an ADVDEC.US Oscillator, which is an indicator designed to analyze the Advance-Decline index (ADVDEC.US) with multiple smoothing techniques and timeframes. Here's what the script does:

Symbol and Inputs:
- The script is based on the ADVDEC.US index, which measures the difference between advancing and declining stocks.

Users can adjust several settings:
- Lookback Period: Defines the number of periods over which the highest and lowest values of the ADVDEC.US index are calculated.
- Smoothing Period: Smooths the oscillator with a simple moving average (SMA) to reduce market noise.
- EMA Period: Applies an Exponential Moving Average (EMA) to the smoothed oscillator for further trend analysis.
- MTF Period: Allows for fetching data from a specified timeframe (default is 5 minutes).

Calculation:
- It calculates the highest and lowest values of the ADVDEC index over the defined lookback period.
- It normalizes the ADVDEC value into a percentage between 0 and 100, representing the position of the current value relative to the range over the lookback period.
- This raw oscillator is then smoothed with an SMA to reduce choppiness.
- Finally, an EMA is calculated on the smoothed oscillator to emphasize the trend direction.

Thresholds:
- Horizontal lines are plotted at key levels (70, 30, and 50) for visual reference, offering an "RSI-style" interpretation of the oscillator.
- The upper and lower thresholds can indicate overbought/oversold conditions, while the midline helps identify neutral levels.

Visualization:
- The smoothed oscillator is plotted in blue.
- The EMA of the smoothed oscillator is plotted in orange.


In summary, this indicator aims to visualize the relationship between advancing and declining stocks with added smoothing and trend-following elements, providing an easy-to-interpret oscillator that can be used for market analysis or decision-making.