This oscillator indicator displays volumes taking into account the direction of the candlestick. If a candlestick is bullish, then the positive histogram of the volume appears, on bearish candlesticks the histogram is negative.
Candlestick direction calculation type is set by the only adjustable parameter:
- Calculation method - calculation method
- Price - calculation using the candlestick Open/Close
- Heiken Ashi - calculation using the Heiken Ashi candlestick method

Fig.1. Calculation using Open/Close

Fig.2. Calculation using Heiken Ashi