Pretty simple EVWMA (Elastic Volume Weighted Moving Average) Cross Strategy. Long on bullish cross, Short on Bearish Crosss.
EVWMA is a quite interesting moving average where period of the MA is defined from volume itself. It incorporates volume information in a natural and logical way. The eVWMA can be looked at as an approximation to the average price paid per share.
As a volume period you can use sum of the last x bars volumes.