<p><strong>Expert Advisor (EA)</strong> is an automated trading program designed to execute trades on a user's behalf based on predefined rules. EAs are typically written in <a href="/NewSite/encyclopedia/mql5/" class="ency-link">MQL5</a>, the programming language of <a href="/NewSite/encyclopedia/metatrader-5/" class="ency-link">MetaTrader 5</a>, and can be backtested to evaluate their historical performance.</p>
<p>EAs matter to traders as they allow for automated decision-making, freeing up time for other tasks. For instance, an EA could be set to automatically close a trade when a certain loss level is reached, helping to manage risk. However, it's crucial to remember that no EA can guarantee 100% accuracy, and all trades involve some level of risk.</p>