Daily Lines - add customizable lines with keep and print forward option

To be able to print yesterdays lines on todays session the indicator works fine. However it is crucial for backtesting and in general to be able to add specific lines (not only open, high, low and close) to the chart and print them with the options "keep X amount of days" and "print forward X amount of days" to avoid redrawing the lines every day as the lines will disappear on the following days. It would be great to have full flexibility over this.

For example:
Add line -> define criteris (high, low, open, close) -> set the amount of days the line shoud be printed on either (day OR session time!)

Add next line (.....)

This would be very helpful. Sometime you just want to add very specific lines on a specific session and over the whole day, which is dependent on the time zone settings and so on.