This very simple script adds a corridor for two low price ranges, where Corona started to hit. Useful to visualize where a stock currently trades at, relative to the Corona / Covid-19 crisis.
Can easily be adjusted for different dates regarding any major events, crashes. Useful when you run out of Alarms and just want to see "is that still below or above where it was before [insert event]?".
Add as many dates as you want, just alter the names of each indicator.