Asia Session Slope Line

## Function Description: Asia Session Slope Line Indicator

This Pine Script indicator analyzes and visualizes the price movement during the Asia trading session.

### What It Does:

**1. Tracks Asia Session Boundaries**
- Monitors when the Asia session starts (default: 00:00 exchange time)
- Monitors when the Asia session ends (default: 09:00 exchange time)
- Places visual markers (green triangle up at start, orange triangle down at end)

**2. Captures Price Data**
- Records the **closing price** at the exact moment the Asia session begins
- Records the **closing price** at the exact moment the Asia session ends
- Tracks the **highest high** and **lowest low** during the entire session

**3. Draws Slope Line**
- Draws a straight line connecting the session start price to the session end price
- Line is **green** if price went up (positive slope)
- Line is **red** if price went down (negative slope)
- Line stops exactly at session boundaries (no extension)

**4. Calculates Slope**
- Computes slope as: `(End Price - Start Price) / Number of Bars`
- This represents the average price change per bar during the session

**5. Displays Slope Value**
- Places a label at the **center** of the Asia session (both horizontally and vertically)
- Shows the slope number with **+ or - prefix** (e.g., "+0.0023" or "-0.0015")
- **White text** on colored background (green for positive, red for negative)
- Label positioned at midpoint between session high and low for clear visibility

### Practical Use:
- Quickly identify Asia session trend direction
- Measure the strength/rate of price movement during Asian hours
- Compare multiple Asia sessions at a glance
- Useful for forex traders monitoring Asian liquidity and price action