A trading signal is a recommendation or alert to buy or sell a specific financial instrument, such as stocks, forex, or cryptocurrencies, based on technical or fundamental analysis. Trading signals can be generated manually by analysts or automatically by algorithms. Types of trading signals: 1. Buy signals: Indicate when to purchase an asset. 2. Sell signals: Indicate when to sell an asset. 3. Entry signals: Indicate when to enter a trade. 4. Exit signals: Indicate when to close a trade. Sources of trading signals: 1. Technical indicators (e.g., moving averages, RSI) 2. Chart patterns (e.g., head and shoulders, trend lines) 3. Fundamental analysis (e.g., earnings reports, economic indicators)