Regional trade agreements are a big deal in global trade, with over 500 agreements influencing how countries trade goods with each other. This paper looks at how these agreements impact competition policies within regions like the EU, ASEAN, and NAFTA. By analyzing the laws around trade agreements and studying stats and case studies, the paper reveals that different regions have varying levels of rules on competition. The EU has a strong, centralized competition policy, ASEAN leans towards decentralization, and NAFTA follows a decentralized model too. Over time, competition policies in these regions have become increasingly important for fair trading.