This Pine Script implements a Supertrend Indicator combined with EMA 9 and EMA 21 for enhanced trend analysis in financial markets. The Supertrend indicator uses the Average True Range (ATR) to identify bullish or bearish trends and generates buy/sell signals based on trend reversals. The script also includes exponential moving averages (EMA 9 and EMA 21) to assist in identifying dynamic support and resistance levels or confirm trend direction. Features like signal highlighting, customizable ATR parameters, and alert conditions make it a versatile tool for traders.