(REQ) add alerts & options to coppock indicator

i was trying to add some alerts,

but, unfortunately i have serious trouble understanding any kind of code.

all i could do was changing histogram to line. lol.

could someone experienced please add:

1) alert for touching/crossing the zero level.

2) alert for reverse slope.

3) the ability to turn on/off separately the alerts.

and if possible, also:

4) the ability to set the trigger to the alert at candle open, close or both.

thx in adv. for your efforts :)

mt4

www. earnforex . com/metatrader-indicators/Coppock