Metastock Formulas - S 1
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Stock Rhythm System 
Schaff Trend Cycle Oscillator
Signal accumulator
Siroc
Smart System design - Long

Stock Rhythm System

In Jeffrey Owen Katz's article "Trading stocks with a cyclical system" he introduces the Stock Rhythm System. In MetaStock 6.5, or higher, you can easily create this system. With MetaStock running choose "System Tester" from the Tools menu, click on the New button and enter the following formulas:

Signal Formulas
Enter Long
thresh:= 4;
k:= 3;
m:= 63;
Value1:= Stdev(Ref(ROC(C,k,$),-m),20);
Value2:= Ref(ROC(C,k,$),-m);
When(Value2 > thresh*Value1)
Close Long
thresh:= 4;
k:= 3;
m:= 63;
Value1:= Stdev(Ref(ROC(C,k,$),-m),20);
Value2:= Ref(ROC(C,k,$),-m);
When(Value2 <-thresh*Value1)
 
Stops
Inactivity Positions - Long and Short Method - Points Minimum Change - 15000 Periods - 10

After entering the formulas click OK, then click on Options. On the Testing page set the Trade Delay to 0, set Positions to Both, then set any other desired options Click OK to save the changes, then open a chart and run the system.

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Schaff Trend Cycle Oscillator

{ Schaff Trend Cycle Oscillator v1.0 }{ Automatic trigger levels }{ Also see: "MACD oscillator - Schaff Trend Cycle" }{ josesilva22@yahoo.com }{ With thanks to Tim Straiton, www.stoploss.ch }

{ variables input }
pdsCy:=Input("Schaff cycle periods",2,252,10);
pdsSh:=Input("Short periods",1,252,10);
pdsLg:=Input("Long periods",2,2520,21);

{ Schaff Trend Cycle }
MCD:=Wilders(MP(),pdsSh)-Wilders(MP(),pdsLg);
ST:=(MCD-LLV(MCD,pdsCy))
 /(HHV(MCD,pdsCy)-LLV(MCD,pdsCy))*100;
STC:=Wilders(ST,pdsCy/2);

{ automatic trigger levels }
pk:=Ref(STC,-1)>STC AND Ref(STC,-1)>Ref(STC,-2);
pkVal:=If(pk,Ref(STC,-1),0);
pkAvg:=Cum(pkVal)/(Cum(pk)+.000001);
pkAvg:=If(pkAvg=0,100,pkAvg);
tr:=Ref(STC,-1)<STC AND Ref(STC,-1)<Ref(STC,-2);
trVal:=If(tr,Ref(STC,-1),0);
trAvg:=Cum(trVal)/(Cum(tr)+.000001);

{ plot on own window }
pkAvg;trAvg;STC

Schaff Trend Cycle Indicator

{ Schaff Trend Cycle Indicator v1.0 }{ Automatic trigger levels }{ Also see: "MACD oscillator - Schaff Trend Cycle" }{ josesilva22@yahoo.com }{ With thanks to Tim Straiton, www.stoploss.ch }

{ variables input }
buffer:=Input("Long/Short buffer zone %",
 0,100,0)/100;
pdsCy:=Input("Schaff cycle periods",2,252,10);
pdsSh:=Input("Short periods",1,252,10);
pdsLg:=Input("Long periods",2,2520,21);

{ Schaff Trend Cycle }
MCD:=Wilders(MP(),pdsSh)-Wilders(MP(),pdsLg);
ST:=(MCD-LLV(MCD,pdsCy))
 /(HHV(MCD,pdsCy)-LLV(MCD,pdsCy))*100;
STC:=Wilders(ST,pdsCy/2);

{ Schaff Trend Cycle }
MCD:=Wilders(MP(),pdsSh)-Wilders(MP(),pdsLg);
ST:=(MCD-LLV(MCD,pdsCy))
 /(HHV(MCD,pdsCy)-LLV(MCD,pdsCy))*100;
STC:=Wilders(ST,pdsCy/2);

{ automatic trigger levels }
pk:=Ref(STC,-1)>STC AND Ref(STC,-1)>Ref(STC,-2);
pkVal:=If(pk,Ref(STC,-1),0);
pkAvg:=Cum(pkVal)/(Cum(pk)+.000001);
pkAvg:=If(pkAvg=0,100,pkAvg);
tr:=Ref(STC,-1)<STC AND Ref(STC,-1)<Ref(STC,-2);
trVal:=If(tr,Ref(STC,-1),0);
trAvg:=Cum(trVal)/(Cum(tr)+.000001);

{ STC crossover signals }
In:=Cross(pkAvg,STC);
Out:=Cross(STC,trAvg);
InInit:=Cum(In)=1;
Init:=Cum(In+Out>-1)=1;
flag:=BarsSince(Init OR In)
 < BarsSince(Init OR Out)+InInit;
signals:=(InInit AND Alert(InInit=0,2)
  OR flag AND Alert(flag=0,2))
   -(flag=0 AND Alert(flag,2));

{ trend support/resistance levels }
STCI:=If(flag,ValueWhen(1,signals,L*(1-buffer)),
 ValueWhen(1,signals=-1 OR Init,H*(1+buffer)));

{ alternative STC crossover signals method}
{bb:=BarsSince(Cross(STC,trAvg));
 bs:=BarsSince(Cross(pkAvg,STC));
 tb:=ValueWhen(1,Cross(STC,trAvg),H*(1+buffer));
 ts:=ValueWhen(1,Cross(pkAvg,STC),L*(1-buffer));
 STCI:=If(bb<bs,tb,ts);}

{ plot on price chart }
STCI

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Signal accumulator

{ Accumulates OBV/Volume (or any other signals)  between & including two user-input dates }

{signal to accumulate - OBV}
x:=If(C>Ref(C,-1),V,If(C<Ref(C,-1),-V,0));

{signal to accumulate - Volume}
{x:=V;}

StDay:=Input("Start Day",1,31,1);
StMnth:=Input("start Month",1,12,10);
StYear:=Input("start Year",1960,2060,2003);
EnDay:=Input("End Day",1,31,31);
EnMnth:=Input("end Month",1,12,10);
EnYear:=Input("end Year",1960,2060,2003);

start:=Year()>StYear
 OR (Year()=StYear AND (Month()>StMnth
  OR Month()=StMnth AND DayOfMonth()>=StDay));
end:=Year()<EnYear
 OR (Year()=EnYear AND (Month()<EnMnth
  OR Month()=EnMnth AND DayOfMonth()<=EnDay));
period:=start AND end;

If(period,Cum(If(period,x,0)),0)

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Siroc

{ Siroc v2.0 }{ System1: trigger crossovers }{ System2: auto over-bought/sold crossovers }{ ©Copyright 2002-2004 Jose Silva }{ josesilva22@yahoo.com }

prd1:=Input("first period",2,252,21);
prd2:=Input("second period",2,252,10);
prdCrs:=Input("crossover periods",2,252,5);
x:=Input("use Open=1 High=2 Low=3 Close=4 MP=5 P=6",1,6,5);
plot:=Input("[1]Siroc,  [2]System1,  [3]System3",1,3,1);

x:=If(x=1,O,If(x=2,H,If(x=3,L,If(x=5,V,If(x=6,P,C)))));
Src:=Mov((x-Mov(x,prd1,E))
 /Ref(Mov(x,prd1,E),-prd1),prd1,E);
prd2:=prd2*2-1;
y:=Src-Ref(Src,-1);

Siroc:=100-100/(1+If(Mov(
 If(Src<Ref(Src,-1),-y,0),prd2,E)=0,1000000,
 Mov(If(Src>Ref(Src,-1),y,0),prd2,E)
/(Mov(If(Src<Ref(Src,-1),-y,0),prd2,E)
 +.000001)));
SirocAvg:=Cum(Siroc)/Cum(Siroc>-1);

{ Automatic peak/trough historical boundaries }
pk:=Ref(Siroc,-1)>Ref(Siroc,-2)
 AND Ref(Siroc,-1)>Siroc
 AND Ref(Siroc,-1)>SirocAvg;
pkVal:=ValueWhen(1,pk,Ref(Siroc,-1));
oBought:=Cum(pkVal)/Cum(pkVal>-1);
tr:=Ref(Siroc,-1)<Ref(Siroc,-2)
 AND Ref(Siroc,-1)<Siroc
 AND Ref(Siroc,-1)<SirocAvg;
trVal:=ValueWhen(1,tr,Ref(Siroc,-1));
oSold:=Cum(trVal)/Cum(trVal>-1);

{ System signals }
dTrigger:=Mov(Siroc,prdCrs,E);
System1:=
 Cross(Siroc,dTrigger)-Cross(dTrigger,Siroc);
System2:=
 Cross(Siroc,oSold)-Cross(Siroc,oBought);
signals:=If(plot=2,System1,System2);

If(plot=1,oBought,0);
If(plot=1,oSold,0);
If(plot=1,dTrigger,0);
If(plot=1,Siroc,signals)

Siroc II

{ Siroc II v2.0 }{ System1: trigger crossovers }{ System2: auto over-bought/sold crossovers }{ ©Copyright 2002-2004 Jose Silva }{ josesilva22@yahoo.com }

prd1:=Input("first period",2,252,21);
prd2:=Input("second period",2,252,10);
prd3:=Input("crossover periods",2,252,5);
x:=Input("use Open=1 High=2 Low=3 Close=4 MP=5 P=6",1,6,5);
plot:=Input("[1]Siroc,  [2]System1,  [3]System3",1,3,1);

x:=If(x=1,O,If(x=2,H,If(x=3,L,If(x=5,MP(),If(x=6,P,C)))));
y:=Mov(x,prd1,E);
z:=Mov((x-y)/Ref(y,-prd1),prd2,E);

Siroc:=100
 *Mov(If(z>Ref(z,-1),z-Ref(z,-1),0),prd3,E)
 /(Mov(If(z>Ref(z,-1),z-Ref(z,-1),0),prd3,E)
 +Mov(If(z<Ref(z,-1),Ref(z,-1)-z,0),prd3,E)
 +.000001);
SirocAvg:=Cum(Siroc)/Cum(Siroc>-1);

{ Automatic peak/trough historical boundaries }
pk:=Ref(Siroc,-1)>Ref(Siroc,-2)
 AND Ref(Siroc,-1)>Siroc
 AND Ref(Siroc,-1)>SirocAvg;
pkVal:=ValueWhen(1,pk,Ref(Siroc,-1));
oBought:=Cum(pkVal)/Cum(pkVal>-1);
tr:=Ref(Siroc,-1)<Ref(Siroc,-2)
 AND Ref(Siroc,-1)<Siroc
 AND Ref(Siroc,-1)<SirocAvg;
trVal:=ValueWhen(1,tr,Ref(Siroc,-1));
oSold:=Cum(trVal)/Cum(trVal>-1);

{ System signals }
dTrigger:=Mov(Siroc,prd3,E);
System1:=
 Cross(Siroc,dTrigger)-Cross(dTrigger,Siroc);
System2:=
 Cross(Siroc,oSold)-Cross(Siroc,oBought);
signals:=If(plot=2,System1,System2);

If(plot=1,oBought,0);
If(plot=1,oSold,0);
If(plot=1,dTrigger,0);
If(plot=1,Siroc,signals)

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Smart System design - Long

{ Simple combined Entry & Exit system }{ Plots +1 spike on entry, -1 on exit signals }{ Warning: this trading system is a design example only - do not trade! }{ ©Copyright 2003 Jose Silva }{ josesilva22@yahoo.com }

{*** user input section ***}

delay:=1;  {delay entry/exit x periods}
pds:=Input("global entry/exit periods",
 1,252,21);
En1:=Input("enable EMA entry",0,1,1);
En2:=Input("enable HHV entry",0,1,1);
Ex1:=Input("enable EMA exit",0,1,1);
Ex2:=Input("enable LLV exit",0,1,1);
Ex3:=Input("enable ATR exit",0,1,1);

{*** place your entry/exit conditions here ***}

EntryCond1:=Cross(C,Mov(C,pds,E)*1.05);
EntryCond2:=Cross(C,Ref(HHV(C,pds),-1));
ExitCond1:=C<Mov(C,pds,E);
ExitCond2:=C<Ref(LLV(C,pds),-1);
ExitCond3:=C<HHV(C,pds)-ATR(pds)*2.5;

{*** system logic section ***}

En1:=If(En1,EntryCond1,0);
En2:=If(En2,EntryCond2,0);
Ex1:=If(Ex1,ExitCond1,0);
Ex2:=If(Ex2,ExitCond2,0);
Ex3:=If(Ex3,ExitCond3,0);

{*** system signals logic section ***}

In:=En1 OR En2;
Out:=Ex1 OR Ex2 OR Ex3;
Init:=Cum(In+Out>-1)=1;
Flag:=BarsSince(Init OR In)
 < BarsSince(Init OR Out)+(Cum(In)=1);

{*** system signals display section ***}

Ref(Flag AND Alert(Flag=0,2),-delay)-
Ref((Flag=0 AND Alert(Flag,2)),-delay)

More advanced system developers:

Smart System Long Entry developer

{ Plots +1 spike on Long entry signal }
{ Warning: this trading system is a design example only - do not trade! }
{ ©Copyright 2003 Jose Silva }
{ josesilva22@yahoo.com }

{*** user input section ***}

pds:=Input("global entry periods",1,252,21);
En1:=Input("enable EMA entry",0,1,1);
En2:=Input("enable HHV entry",0,1,1);
En3:=Input("enable ATR entry",0,1,1);
En4:=Input("enable WR% entry",0,1,1);
En5:=Input("enable CMF entry",0,1,1);

{*** place your entry Long conditions here ***}

Entry1:=Cross(C,Mov(C,pds,E)*1.05);
Entry2:=Cross(C,Ref(HHV(C,pds),-1));
Entry3:=Cross(C,HHV(C-2.5*ATR(pds),pds));
Entry4:=Cross(WillR(pds),-50);
Entry5:=Cross(CMF(pds),0);

{*** system logic section ***}

En1:=If(En1,Entry1,0);
En2:=If(En2,Entry2,0);
En3:=If(En3,Entry3,0);
En4:=If(En4,Entry4,0);
En5:=If(En5,Entry5,0);
entry:=En1 OR En2 OR En3 OR En4 OR En5;

{*** system entry output section ***}

entry

Smart System Long Exit developer

{Plots -1 spike on Long exit signal}
{Warning: this trading system is a design example only - do not trade!}
{©Copyright 2003 Jose Silva}
{josesilva22@yahoo.com}

{*** user input section ***}

pds:=Input("global exit periods",1,252,10);
Ex1:=Input("enable EMA exit",0,1,1);
Ex2:=Input("enable LLV exit",0,1,1);
Ex3:=Input("enable ATR exit",0,1,1);
Ex4:=Input("enable WR% exit",0,1,1);
Ex5:=Input("enable CMF exit",0,1,1);

{*** place your exit Long conditions here ***}

Exit1:=C<Mov(C,pds,E);
Exit2:=C<Ref(LLV(C,pds),-1);
Exit3:=C<LLV(C+2.5*ATR(pds),pds);
Exit4:=WillR(pds)<-50;
Exit5:=CMF(pds)<0;

{*** system logic section ***}

Ex1:=If(Ex1,Exit1,0);
Ex2:=If(Ex2,Exit2,0);
Ex3:=If(Ex3,Exit3,0);
Ex4:=If(Ex4,Exit4,0);
Ex5:=If(Ex5,Exit5,0);
exit:=-(Ex1 OR Ex2 OR Ex3 OR Ex4 OR Ex5);

{*** system exit output section ***}

exit

Smart System Long trade signals

{ Plots +1 on entry, -1 spike on exit signals }{ Change user-input default settings within code in referenced indicators: "Smart System Long Entry developer" & "Smart System Long Exit developer" }

{ Warning: this trading system is a design example only - do not trade! }{ ©Copyright 2003 Jose Silva }{ josesilva22@yahoo.com }

delay:=Input("Entry and Exit delay",0,5,0);
plot:=Input("plot:  entry/exit signals=1,  trade binary=2",1,2,1);

In:=Fml("Smart System Long Entry developer");
Out:=Fml("Smart System Long Exit developer")=-1;

Init:=Cum(In+Out>-1)=1;
InInit:=Cum(In)=1;
flag:=Ref(BarsSince(Init OR In)
 < BarsSince(Init OR Out)+InInit,-delay);
In1:=Cum(Cum(In))=1;
Out1:=Cum(Cum(Out))=1;
signals:=(InInit AND Alert(InInit=0,2)
  OR flag AND Alert(flag=0,2))
   -(flag=0 AND Alert(flag,2));
odd:=Cum(1)/2=Int(Cum(1)/2);

0;
Ref(If(plot=1,In1,0),-delay);
If(plot=1,-Ref(Out1 AND BarsSince(In1)
 >=BarsSince(Out1),-delay),0);
If(plot=1,0,If(odd,flag,0));
If(plot=1,signals,flag)

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