Chaikin Money Flow (CMF)Volume-weighted buying/selling pressure is a SMA of directional Money Flow Volume
Klinger Volume Oscillator (KVO)Long/short-term volume momentum, trend reversal, and divergence of money flow
Price Volume Oscillator (PVO)Rate of change between two converging / diverging EMA of volume (MACD of volume)
Volume-weighted average price (VWAP)Volume weighted average of price, typically used on intraday data