This is original indicator by Thomas Bieravic from a book of "Trading Systems and Methods" (Wiley Trading) 6th Edition by Perry J. Kaufman. The author was change volume on true range in formula and added signal line for analyze of volatility.
In true TradingView spirit, the author of this script has published it open-source, so traders can understand and verify it. Cheers to the author! You may use it for free, but reuse of this code in publications is governed by House rules. คุณสามารถตั้งเป็นรายการโปรดเพื่อใช้บนชาร์ตได้