Do I need to be a trader to use MCP? Can investors use it too?

MCP is built for both. If you're an active trader, you can track positions, check margins, or conduct technical analysis of your positions or holdings and get technical view on a security.  

If you're a long-term investor, you can use it to periodically review your portfolio with the help of AI, ensure your portfolio is well-diversified, and see how your holdings are performing against benchmarks. There's something useful in it for everyone.