Pring Special K|a2m

# 📈 Pring Special K | a2m

The **Pring Special K (PSK)** is a momentum indicator developed by **Martin Pring**, designed to capture both short-term and long-term market cycles in one oscillator.
This version includes **customizable smoothing** and **Bollinger Bands** for enhanced visualization of momentum shifts.

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## 🏷️ Tagline
**“Multi-cycle momentum oscillator with smoothing & Bollinger Bands for trend confirmation and early reversals.”**

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## 📄 Short Description
The Pring Special K blends **short-term and long-term ROC cycles** into one powerful momentum oscillator.
This version adds **SMA, EMA, WMA, RMA, VWMA smoothing options** and optional **Bollinger Bands**.
Use it to:
- Confirm **long-term trends**
- Spot **early reversals**
- Identify **divergences around the zero line**

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## ⚙️ Features
✅ **Core PSK Calculation** (Martin Pring’s weighted ROC methodology)
✅ **Momentum Color-Coding** → Green (bullish) / Red (bearish)
✅ **Smoothing Options** → SMA, EMA, WMA, SMMA (RMA), VWMA
✅ **Optional Bollinger Bands** (with adjustable length & StdDev multiplier)
✅ **Zero Line Reference** for trend confirmation

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## 🎛️ User Inputs
- **Source** → Default: `close`
- **Type** → `"None"`, `"SMA"`, `"SMA + Bollinger Bands"`, `"EMA"`, `"SMMA (RMA)"`, `"WMA"`, `"VWMA"`
- **Length** → Default: `20`
- **BB StdDev** → Default: `2.0` (active only with SMA + Bollinger Bands)

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## 📊 How to Use
1. **Trend Identification**
- PSK rising above 0 → Long-term uptrend
- PSK falling below 0 → Long-term downtrend

2. **Momentum Shifts**
- Watch PSK crossing its **smoothing MA** for entry/exit signals.
- Bollinger Bands help spot **momentum extensions** or **contractions**.

3. **Divergences**
- Compare PSK vs. price swings to catch early **trend reversals**.

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## 🖼️ Visual Guide
- **Green PSK Line** → Bullish momentum
- **Red PSK Line** → Bearish momentum
- **Blue Line** → Smoothing MA
- **Shaded Green Bands** → Bollinger Bands (if enabled)
- **Gray Dotted Line** → Zero momentum baseline

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