I am looking for an indior which sends an alert (soundwawe, pop up window and target on the chart) in these conditions:

The price retraces below (or over) 2 emas, 10 and 20 for example.
Once the price is going back (or below) those 2 emas I want to receive this sign ( once and once only,if possible ).

Do you know where I could find this kind of indior? Or could it be programmed by somebody?
Thanks on advance for your help.