SetBarsRequired(sbrAll);

sd = ParamDate("Input Date","2012-02-14",0); 
st=ParamTime("input time","1:44",0);
dn = DateNum(); 
tn=TimeNum();
 
start = dn == sd AND tn==st; 


 
mp =  ParamField("Price field",-1);
 
PV1= Cum(mp * V); 
CV1= Cum( V ); 

D=Param("D",6120000000,50000,9000000000000);

PV=PV1-ValueWhen(sd==dn AND tn==st,PV1,1);
CV=CV1-ValueWhen(sd==dn AND tn==st,CV1,1);

E=CV*(1-CV/D);

ET=CV-E;


startloop=EndValue(ValueWhen(sd==dn AND tn==st,BarIndex(),1));
endloop=EndValue(IIf(CV>D,ValueWhen(CV<D,BarIndex(),1),BarCount));

barint=0;

TBF=mp;

for (j=startloop+1;j<endloop;j++)
	{
				k=0;
				i=startloop+1;
		while (ET[j]>0 AND k==0)
					{
				
				if (CV[i]>ET[j])
							{
							k=1;
							
							}
					i=i+1;
					}

		if (k==1)
					{
					barint[j]=i-1;
					}

		Volint[j]=CV[barint[j]]-ET[j];
		Mpint[j]=Low[barint[j]]*Volint[j];

		CVint[j]=CV[j]-CV[barint[j]]+Volint[j];
		PVint[j]=PV[j]-PV[barint[j]]+Mpint[j];
		TBF[0]=Low[0];
		TBF[j]=PVint[j]/CVInt[j];
		


			
		}

TBF1=IIf(BarsSince(start),TBF,Null);

PCT=100*CV/D;



tbf2=IIf(BarIndex()<endloop,TBF1,Null);
	
		

		





Plot(TBF2,"PCT="+WriteVal(PCT,1.0)+"TBF",ParamColor( "Color", colorCycle ), ParamStyle("Style") );