No Trading Zone (NZT)The script highlights Frankfurt's opening range up until New York's close. It is described as No Trading Zone in Gabrielle Fabris's The Price in Time book.
Projections of the Frankfurt range are potential supports and resistances and they are used in trade management & for taking profits in his system.
Full rules are not mine to share. You have to read the book to understand his system and run your own backtest on each pair to find out what management method you will be most comfortable with.