Loss in trading refers to the financial setback a trader experiences when the price of a financial instrument moves against their position, resulting in a decrease in their invested capital. It occurs when an asset is sold for less than its purchase price or when leveraged positions amplify unfavorable market movements. Losses are a natural part of trading in markets such as forex, stocks, commodities, and cryptocurrencies, as prices are influenced by volatility, economic events, and market sentiment. While losses cannot be avoided entirely, traders manage them through risk management strategies like stop-loss orders, position sizing, and diversification to protect their capital and sustain long-term profitability.