UP
1) Curr Vol > Prev Vol and Curr Close > Curr Open 
2) Calculate MA Bar Size: (input -- EMA / SMA) of Bar Size (High - Low) (bar period is input)
3) Calculate MA Volume:   (input -- EMA / SMA) of Volume (same bar period input as Bar Size)
4) If Current Bar Size (High - Low) >  MA Bar Size by some spike percent (input eg 50%) and 
      Current Volume > MA Volume some spike percent (input eg 50%) 
      Put green up arrow above price on chart window   
    
Down
1) Curr Vol < Prev Vol and Curr Close < Curr Open 
2) Calculate MA Bar Size: (input -- EMA / SMA) of Bar Size (High - Low) (bar period is input)
3) Calculate MA Volume:   (input -- EMA / SMA) of Volume (same bar period input as Bar Size)
4) If Current Bar Size (High - Low) >  MA Bar Size by some spike percent (input eg 50%) and 
      Current Volume > MA Volume some spike percent (input eg 50%) 
      Put red down arrow below price on chart window
      
Inputs:   
Spike Percent for Bar Size 
Spike Percent for Volume
MA Bar Size (EMA or SMA) Bar Period
MA Volume (EMA or SMA) Bar Period