This script distinguishes up/down volume based on lower resolution. It's important to set correct inputs. Second - affects detalisation/loading speed. Third one needs to be set according to your chart resolution. 1440 for 'D', 30 for '30'.
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