The Volume RSI (Relative Strength Index) is quite similar to the price based RSI with difference that up-volume and down-volume are used in the RSI formula instead changes in price. If price RSI shows relation between up-moves and down-moves within an analyzed period of time by revealing which moves are stronger, the Volume RSI indicator shows the relation between volume traded during these price up-moves and down- moves respectfully by revealing whether up-volume (bullish money flow) or down-volume (bearish money flow) is stronger.
This indicator estimates the buy and sell volume of each candle by using a configurable lower time-frame and uses the buy and sell volume in the calculation of the RSI Volume (VoRSI)
Happy trading
Hancock