Craig: While I cannot answer for subscribers, I suggest you do the following. On the Extreme-OS page, you’ll see a link that says “Real Trade Stats Available.” When you click that link, your will see the average real fill prices actually achieved in live brokerage accounts (at multiple real-life brokers). So that should help answer your question about whether the prices shown on Extreme-OS are achievable. (Take a look at the results in the last 30 days, for example.)