HM2 - Swing Low High 1-2

# HM2 Swing Low High 1-2 Indicator Logic Description

## Overview
This indicator identifies and tracks key swing points in price action, specifically maintaining four critical levels: **SL1, SL2, SH1, and SH2**. These levels represent a hierarchy of support and resistance based on recent price swings.

## Core Logic

### Swing Point Detection
The indicator uses a **symmetrical swing detection method**:
- **Swing Length Parameter**: Defines how many candles on each side of a potential swing point must be higher (for lows) or lower (for highs)
- **Confirmation**: Only processes confirmed/closed candles to avoid repainting
- **Lookback Buffer**: Waits for adequate price history before making determinations

### The Four Key Levels

#### **SL1 (Swing Low 1) - Most Recent Low**
- The most recently formed swing low
- Always the latest confirmed low point in the price structure
- Updates whenever a new swing low is detected

#### **SL2 (Swing Low 2) - Lower Reference Low**
- The most recent swing low that is **below** SL1
- Must be lower in price than SL1 (deeper support level)
- Provides context for the support structure below current levels

#### **SH1 (Swing High 1) - Most Recent High**
- The most recently formed swing high
- Always the latest confirmed high point in the price structure
- Updates whenever a new swing high is detected

#### **SH2 (Swing High 2) - Higher Reference High**
- The highest swing high that is **above** SH1
- Must be higher in price than SH1 (stronger resistance level)
- Represents the most significant resistance overhead

## Key Features

### Smart Level Management
- **Array-Based Storage**: Maintains up to 50 recent swing points for performance optimization
- **Duplicate Prevention**: Prevents the same bar from being recorded multiple times
- **Hierarchy Enforcement**: SL2 must be below SL1, and SH2 must be above SH1

### Visual Elements
- **Horizontal Lines**: Draw from the swing point to current price with customizable extension
- **Background Plots**: Subtle reference lines for all four levels
- **Labels**: Clear "SL1", "SL2", "SH1", "SH2" labels positioned to the right of current price
- **Detection Markers**: Small triangular markers show when new swing points are detected

### Customization Options
- **Swing Length**: Adjustable sensitivity (1-10 candles)
- **Visual Controls**: Toggle labels and lines on/off
- **Line Extension**: Choose how lines extend (none, right, or both directions)
- **Color Customization**: Separate colors for lows (default red) and highs (default green)

## Practical Application

This indicator is particularly useful for:
- **Support/Resistance Trading**: The four levels provide clear zones for potential reversals
- **Trend Analysis**: Understanding the relationship between recent highs and lows
- **Entry/Exit Planning**: Using the hierarchy of levels for stop-loss and target placement
- **Market Structure**: Visualizing the current swing structure in any timeframe

The indicator automatically updates as new swing points form, ensuring traders always have the most current and relevant support/resistance levels based on actual price structure rather than arbitrary technical levels.