Your trading platform is your brokerage’s storefront. In a sea of competition, its speed, reliability, and customization options can make or break your user experience. MT4 and MT5 remain popular, but newer platforms like Traderio are gaining ground due to flexibility, cost-efficiency, and native web/mobile compatibility. You’ll need to decide whether to lease a white-label, rent SaaS, or purchase source code. Think not only about current needs, but how the platform will scale as you grow—can you customize it, localize it, or integrate it with other tools easily?