Dow Theory - Manit

This Pine Script implements a Dow Theory swing-structure indicator that:

• Detects pivot highs and lows using left/right bar sensitivity
• Filters them into a zigzag-style structure (removing weak swings)
• Classifies market structure as:
  HH (Higher High)
  HL (Higher Low)
  LH (Lower High)
  LL (Lower Low)

• Automatically builds dynamic support and resistance levels from valid swing points
• Tracks trend direction:
  – Above resistance → uptrend
  – Below support → downtrend

• Draws extending horizontal S/R lines that update only when structure changes