[FGL] Stochastic ATR Trend Indicator

This indicator:

1. Detects trend direction using ATR-based dynamic bands around SMA.
   
2. Generates buy/sell signals using Stochastic crossover conditions filtered by trend.
   
3. Colors candles to show trend direction.
   
4. Plots a visual “trend zone” band on the chart.
   

INPUT PARAMETERS:

• Stochastic Length → Period for the stochastic oscillator.
  
• Smooth K and Smooth D → Smoothing parameters for %K and %D lines.
  
• ATR Length → Period used for SMA-based trend detection.
  

LOGIC FLOW

• Determine trend using long ATR-based SMA channel.
  
• Detect momentum change with Stochastic cross.
  
• Confirm both momentum and price align with trend.
  
• Generate buy/sell signal + change candle color.
  

STRATEGIC INTERPRETATION

• Best use: Trend-following momentum entries.
  
• Avoids: Countertrend false signals by filtering with trend value.
  
• Signals:
  
  • Buy: In uptrend + bullish stochastic crossover.
    
  • Sell: In downtrend + bearish stochastic crossover.