How do I turn a strategy into a custom alert?

I'm just wondering if there are any resources out there that would guide one through making a custom alert out of a particular set of criteria? I've used sites like forexadvisor.com to generate an EA. Is there something similar for an EA that doesn't buy or sell, but only alerts? Or perhaps a youtube tutorial on how to? I haven't had much luck searching thus far.

Example: If price is above 200 EMA, send alert when price goes below 5 EMA and RSI(2) goes under value of 5
If price is below 200 EMA, send alert when price goes above 5 EMA and RSI(2) goes above value of 95

An indicator must be coded to check when your setup is found and then trigger an alert (arrows/popup/sound/email/push).

So one would have to build a custom indicator (not an EA)

Exact.

An EA is trading your setup when it occurs in real time ... while an indicator is able to show (eg. arrows) the whole historical setups.

Depends on the platform you are using.
If you use ProRealTime charts, you can create an alert using events from several time frames - triggered off standard indicators.
Look for easy solutions before trying the difficult ones.
Cheers, H