IM_AngleIndicator is a technical indicator that measures the slope angle of a simple moving average (SMA) normalized by the Average True Range (ATR). This normalization expresses the slope in degrees, making it comparable across different instruments and timeframes. The indicator calculates the SMA on closing prices, measures its change between bars, normalizes this change by the ATR, and converts the ratio into an angle between approximately −90° and +90°. It displays the angle as an oscillator in a dedicated panel and adds color-coded labels on the price chart to indicate strong bullish (green) or bearish (red) trends.

Key features include:
- ATR normalization for consistent slope measurement regardless of instrument or timeframe.
- Configurable angle thresholds to filter significant trend moves and reduce noise.
- Directional labels positioned relative to price bars for clear trend visualization.
- Customizable parameters such as SMA period, ATR period, slope threshold, label visibility, and maximum label count.
- Optimized label management for performance on long chart histories.

Use cases involve identifying strong trend phases, detecting potential reversals, confirming trade entries and exits, and comparing trend strength across multiple markets including Forex, commodities, and indices.