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/*
Volume Flow Indicator
*/
Period = Param("VFI Period",26,26,1300,1);
Coef=0.2;
VCoef=Param("Max. vol. cutoff",2.5,2.5,50,1);
inter = log(Avg)-log(Ref(Avg,-1));
Vinter = StDev(inter,30);
Cutoff=Coef*Vinter*Close;
Vave=Ref(MA(V,Period),-1);
Vmax=Vave*Vcoef;
Vc=Min(V,VMax);
MF=Avg-Ref(Avg,-1);
VCP=IIf(MF>Cutoff,VC,IIf(MF<-Cutoff,-VC,0));
VFI=Sum(VCP,Period)/Vave;
VFI=EMA(VFI,3);
Plot(VFI,"VFI",colorBlack,styleThick);
Plot(EMA(VFI,10),"EMA10 or VFI",colorBrown);
Plot(0,"",colorSeaGreen,styleNoLabel);
Plot(V,"Volume",IIf(VCP>0,colorGreen,IIf(VCP<0,colorRed,colorBlue)),
styleHistogram | styleOwnScale | styleNoLabel);
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