Scu, the big flaw with that website is that it calculates its gains based off of the quoted price for the security. That doesn't mean you'd be able to get filled at that price if, for example, you're trying to sell and the quoted price is the ASK.
Register for free to join our community of investors and share your ideas. You will also get access to streaming quotes, interactive charts, trades, portfolio, live options flow and more tools.