Buy - Average volume has fallen by at least v%
Sell - Average volume has fallen by at least v%
Parameters available:
t1 - the period used for calculation of volume v1
t2 - the period used for calculation of volume v2
v - the minimum percentage of volume decrement
Rule type - please refer to 140 for details
Data type - please refer to 141 for details
![\includegraphics[width=0.7\textwidth ,bb=0 0 292 180]{VolumeDecrease.png}](images/img-0032.png)