Common trading strategy mistakes can seriously hurt your results. The biggest errors include lack of research, jumping into trades without understanding the market or the asset, and emotional trading, where fear or greed override logic. Many traders fail by not developing a clear strategy or plan, leading to impulsive decisions and losses. Over-leveraging is another major risk, as it magnifies losses and can wipe out your capital quickly. Ignoring market news and failing to stay updated also cause missed opportunities or unexpected setbacks. Additionally, overtrading and blindly following the crowd without personal analysis often lead to poor outcomes. To trade smarter, always research thoroughly, stick to your plan, manage risk carefully, and keep emotions in check.