One of the most common trading strategy mistakes is entering the market without a clear plan. Many traders rely too heavily on emotions or gut feelings instead of data and proven setups. Another frequent error is overtrading — chasing every price move without understanding the bigger trend. Risk management is often neglected as well; placing trades without stop-losses or proper position sizing can wipe out accounts quickly. It's also a mistake to ignore market news or global events that can cause volatility. Every trader must learn that patience, discipline, and continuous learning are the keys to long-term success.