The indicator is based on the indicators' code of MetaQuotes Software Corp. Bears.mq5 and Bulls.mq5.
Indicator values are calculated by the following scheme:
Bull >0 and Bear>0 => Ind= Bull – Bear
Bull <0 and Bear<0 => Ind= Bear- Bull
(Bull <0 and Bear>0 ) or (Bull >0 and Bear<0 ) => Ind= Bear+Bull
The received Ind value multiplies on the coefficient of volume. The volume can be as tick, so real (set in input parameters). Then if the delta i.e. flat noise level is set, all the indicator values less than zero are set to zero.

The example 1. The work of the BullsBearsVolume indicator at EURUSD H1

The example 2. The work of the BullsBearsVolume indicator at EURUSD H1

The window of the indicator parameters setting.