No, SSY does not support the widely-used platforms MT4 or MT5. SSY appears to offer specialized platforms or custom tools suited for their niche markets, which could be limiting for traders who are accustomed to MetaTrader platforms. Personally, I prefer trading on platforms like MT4 or MT5 due to their flexibility, customization, and wide use. If you're someone like me who values those features, SSY’s lack of support for MT4 or MT5 could be a dealbreaker. It’s important to consider your platform preferences before proceeding with SSY brokers.