A De Mark Count Down is completed when:-

1. The low of TD Buy Countdown bar thirteen must be less than, or equal to, the
close of TD Buy Countdown bar eight, and
2. The close of TD Buy Countdown bar thirteen must be less than, or equal to, the
low two bars earlier

I first plot the following indicators

TD - SetUp-buy
TD1:=If(CLOSE<Ref(CLOSE,-4),1,0);
TD2:=If(TD1=1 AND Ref(TD1,-1)=1 AND Ref(TD1,-2)=1 AND Ref(TD1,-3)=1 AND Ref(TD1,-4)=1 AND Ref(TD1,-5)=1 AND Ref(TD1,-6)=1 AND Ref(TD1,-7)=1 AND Ref(TD1,-8)=1, 1,0);
TD3:=If(Ref(C,-9)>=Ref(C,-13),1,0); {>= may be changed in >}
TD4:=If(TD2=1 AND TD3=1,1,0);
TD5:=If(HIGH>=Ref(LLV(LOW,5),-3),1,0);
D8:=If(Ref(TD4,-1)=1 AND TD5=1,1,0);
D9:=If(TD4=1 AND TD5=1 AND Ref(D8,-1)<>1,1,0);
D10:=If(Ref(TD4,-1)=1 AND TD5=1 AND Ref(D8,-2)<>1 AND Ref(D9,-1)<>1,1,0);
D11:=If(Ref(TD4,-2)=1 AND TD5=1 AND Ref(D8,-3)<>1 AND Ref(D9,-2)<>1 AND Ref(D10,-1)<>1,1,0);
D12:=If(Ref(TD4,-3)=1 AND TD5=1 AND Ref(D8,-4)<>1 AND Ref(D9,-3)<>1 AND Ref(D10,-2)<>1 AND Ref(D11,-1)<>1,1,0);
D13:=If(Ref(TD4,-4)=1 AND TD5=1 AND Ref(D8,-5)<>1 AND Ref(D9,-4)<>1 AND Ref(D10,-3)<>1 AND Ref(D11,-2)<>1 AND Ref(D12,-1)<>1,1,0);
D14:=If(Ref(TD4,-5)=1 AND TD5=1 AND Ref(D8,-6)<>1 AND Ref(D9,-5)<>1 AND Ref(D10,-4)<>1 AND Ref(D11,-3)<>1 AND Ref(D12,-2)<>1 AND Ref(D13,-1)<>1,1,0);
D15:=If(Ref(TD4,-6)=1 AND TD5=1 AND Ref(D8,-7)<>1 AND Ref(D9,-6)<>1 AND Ref(D10,-5)<>1 AND Ref(D11,-4)<>1 AND Ref(D12,-3)<>1 AND Ref(D13,-2)<>1 AND Ref(D14,-1)<>1,1,0);
D16:=If(Ref(TD4,-7)=1 AND TD5=1 AND Ref(D8,-8)<>1 AND Ref(D9,-7)<>1 AND Ref(D10,-6)<>1 AND Ref(D11,-5)<>1 AND Ref(D12,-4)<>1 AND Ref(D13,-3)<>1 AND Ref(D14,-2)<>1 AND Ref(D15,-1)<>1,1,0);
D17:=If(Ref(TD4,-8)=1 AND TD5=1 AND Ref(D8,-9)<>1 AND Ref(D9,-8)<>1 AND Ref(D10,-7)<>1 AND Ref(D11,-6)<>1 AND Ref(D12,-5)<>1 AND Ref(D13,-4)<>1 AND Ref(D14,-3)<>1 AND Ref(D15,-2)<>1 AND Ref(D16,-1)<>1,1,0);
SetUp:=D8+D9+D10+D11+D12+D13+D14+D15+D16+D17;
SetUp

TD Count Down Buy A

Cum(If(CLOSE<Ref(CLOSE,-2),1,0))-ValueWhen(1,Ref( Fml( "TD - SetUp-buy" ), -1)=1, Cum(If(CLOSE<Ref(CLOSE,-2),1,0)))

the Expert Advisor Countdown buy Bar 13 and Bar 8

Fml( "TD Count Down Buy A" ) =14
AND Ref( Fml( "TD Count Down Buy A" ) ,-1 )<> 14


Fml( "TD Count Down Buy A" ) =9
AND Ref( Fml( "TD Count Down Buy A" ) ,-1 )<> 9

Then I plot the exploration formula

A:=Fml( "TD Count Down Buy A" ) =9
AND Ref( Fml( "TD Count Down Buy A" ) ,-1 )<> 9;
B:=Fml( "TD Count Down Buy A" ) =14
AND Ref( Fml( "TD Count Down Buy A" ) ,-1 )<> 14;
B AND L<=A AND C<= Ref(L,-2)

I plug this into filter but the exploration gives a 100% rejection. Where am I going wrong?
Can anybody help?
If Bar 13
Fml( "TD Count Down Buy A" ) =14
AND Ref( Fml( "TD Count Down Buy A" ) ,-1 )<> 14
can be modified in the expert code including the conditions
1. The low of TD Buy Countdown bar thirteen must be less than, or equal to, the
close of TD Buy Countdown bar eight, and
2. The close of TD Buy Countdown bar thirteen must be less than, or equal to, the
low two bars earlier
----that would definitely solve the problem.
Regards,

Dr.Chatterjee