Alert based on the closing price of a candle of specific time length

[E_Sophiea]

This seems so simple, but I am stuck.

I want to have an alert (just a standard, boring run of the mill alert) that is only triggered when the closing price of a candle (whatever length I specify) is past the threshold. Not just when the price goes past the value, but when a candle of specified time closes past it.

Example: Alert when the closing price on a 30 min candle is above a specified price. So, at most, this would trigger once an hour.

I tried doing this using a study in an alert, where the study is the close with an aggregation period of 30 min, but it doesn't seem to work. Hopefully that's because I'm too dumb to set it up, and it's actually very easy.

Thanks in advance for any help, or for pointing me in a useful direction!

 

[MerryDay]

@E_Sophiea

def xprice = (fill in specified price) ;
plot trigger = close is greater than xprice ;

# Alert
Alert(trigger, "close is greater than xprice", Alert.Bar, Sound.Chimes);