Volume alarm

PLTR had a big sell of late during the day. Volume is always high at opening but settles down after 1 hour. To know if volume is high during the first hour it only makes sence to compare it with the first hour the day before. If the volume is high for the rest of the day (after one hour till end) it only makes sence to compare it to the volume level of the day before (between 1 hour after opening and end). A volume alarm like that would alert you that something is happening like the sell of of PLTR yesterday (at an odd hour).

A scanner with this kind of volume filter could also sort out the stocks that are popular during opening hour and/ or the rest of the day.