Technical indicators are mathematical tools used in trading to analyze historical price data, trading volume, and market trends to predict future price movements. They are applied to charts and help traders identify patterns, momentum, volatility, and potential entry or exit points in financial markets such as forex, stocks, or cryptocurrencies. Common types include trend indicators (like Moving Averages), momentum indicators (such as RSI and MACD), volatility indicators (like Bollinger Bands), and volume indicators (such as On-Balance Volume). By combining technical indicators with price action analysis, traders can make more informed and strategic trading decisions.