Add alert to an existing .ex4 Indicator

Hello,

Take a look at the PNG file attached, it makes it easier to understand.

Basically, I just want you to add to this indicator:
- a BUY sound alert when the price crosses below (and only below) the lowest green line of the MBFX System.
- a SELL sound alert when the price crosses above (and only above) the highest red line of the MBFX System.

I intend to use it on M1 or M5 time frames on Metatrader 4.

Alert must have sound and email.

Thank you in advance.