Modify this indicator of volume

Hello!
Some kind person that can modify this indicator, so that it generates only an alert when the volume touches a configured level.
Currently the indicator works, but when the volume touches the level it starts to show many alerts.
The idea is that the indicator only shows an alert, once the volume reaches the level. Only one alert.

For example, if the volume reaches level 200, the indicator shows an alert. That is all.

Hello, this is a honest question, how do you use Volume to take advantage of the market?

This should do it.