Please add a feature to the Bollinger Bands indicator

I want to add a marker function to the Bollinger Bands indicator to compare the difference between the upper and lower channels with ATR20:
Draw a green vertical line when the difference value is <= 3;
Draw a red vertical line when the difference is >= 10.
As shown below:



The source code for the Bollinger Bands indicator is attached：

Thank you very much to the kind person who is willing to help me。

I tried making one, but it didn't seem very useful, although I don't quite understand what units you mean by 3 and 10...

Thank you!
Forgive me for not describing it clearly.
Delta=(upper Bollinger Bands - lower Bollinger Bands)/ATR20;
If DELTA<3, draw a green line; if DELTA>10, draw a red line。
Of course, the Atr20 period and 3,10 should be adjustable。