Afl To Scan Increase In Volume

#12
hi
Required Afl to scan for volume rise

HTML:
pcp=Param("pc",5,.5,100);
a=(C-Ref(C,-1))*100/Ref(C,-1);
B =(V -MA(V,50))*100/V ;
Buy=a>pcp AND C>10;
Sell=a<-pcp AND C>10;
VolRISE=B;
Filter=Buy OR Sell;
AddColumn(Close,"close",1.1); 
AddColumn(a,"% change",1.1); 
AddColumn(B,"% volumechange",1.0); 
AddColumn(Buy,"Buy",1.1); 
AddColumn(Sell,"SELL",1.1); 

//IT CALCULATES VOLUME RISE ABOVE 50DAY AVERAGE VOLUME
//IN EXPLORATION CHOOSE FOR RANGE=FROM TO DATES