Hello!
I'm Alex, professional programmer for TradingView platform
Classic Marubozu is a kind of patter when High and Low equal to Open/Close depend on bullish or bearish candle. But as I understand you want to highlate the candle which extend range of last X candles before, right? Anyway, I definitely can help you to implement your idea
Have a look on feedbacks of my happy customers to assure I'm very familiar with pine script coding
Contact me with details of the project,
Kind regards,
Alex