Bollinger Squeeze Alert (ps for the coders)

Hi Team,

Im looking to use the Bollinger Squeeze (v9) for my exits, however the indicator doesnt seem to have an inbuilt alert fucntion (ie popup, sound etc).

Im wanting the alert to trigger when the indicators crosses the zero line above and below at the close of the candle.

Anyone help with this?? Please..lol

Please find attached the indicator...sorry for that..

if you have the original mq4 file it would help. coding an alert shouldn't take too much time.

not sure because not tested yet ...