I'd be pleased to help you with this. I'm a full time Forex programmer - you can check all my excellent ratings on MT4 projects built during the last year. Before of that, I was a website programmer. However, my experience is mainly in .Net. Would you agree to have the site/page in .Net?
If you want PHP only, I'll ask a friend to help on that part.
The MT4 knowledge however is unqestionable, and you'll probably not find a more reliable programmer for this project. Do you have the specifications for how the signals are generated yet, or you need help to design them as well? Either way, I'd be happy to help you with it.
Let me know if you're interested so we can talk more about it.
Phillip.