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Combining Statistical and
Pattern Analysis, Shark – 32
MetaStock Formula
In MetaStock for Windows you can use the Expert Advisor to
recreate the "Shark – 32" signals on your charts as discussed in
Walter T. Down's article "Combining Statistical and Pattern
Analysis".
First, choose Expert Advisor from the Tools menu in MetaStock 6.5.
Next, choose New and enter the following formulas:
Name:
Click the Name tab and enter "Shark – 32" in the Name field.
Trends:
Click the Trends tab and enter the following formulas in the Bullish
and Bearish fields.
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| Bullish:
Mov(C,5,S)>Mov(C,20,S); |
| Bearish:
Mov(C,5,S)<Mov(C,20,S); |
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Highlights:
Click the Highlights tab, choose New, and enter "3rd Bar" in the
Name field. Now change the color in the Color field to Blue.
Finally, enter the following formula in the Condition field, and
then choose OK.
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Symmetry:=.28;
Apex:=(H+L)/2;
WB:=Ref(H,-2)-Ref(L,-2);
Shark:=If((H<Ref(H,-1) AND L>Ref(L,-1) AND Ref(H,-1)<Ref(H,-2)
AND Ref(L,-1)>Ref(L,-2))=1,If(Apex <= (Ref(H,-2)-(WB*Symmetry))
AND Apex >= (Ref(L,-2)+(WB*Symmetry)) ,1,0),0);
Shark; |
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Using the same method as above, enter the following 2 highlight
formulas.
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| Name: 2nd Bar |
| Color: Blue |
Condition:
Symmetry:=.28;
Apex:=(H+L)/2;
WB:=Ref(H,-2)-Ref(L,-2);
Shark:=If((H<Ref(H,-1) AND L>Ref(L,-1) AND Ref(H,-1)<Ref(H,-2)
AND Ref(L,-1)>Ref(L,-2))=1,If(Apex <= (Ref(H,-2)-(WB*Symmetry))
AND Apex >= (Ref(L,-2)+(WB*Symmetry)) ,1,0),0);
Ref(Shark,+1)=1; |
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| Name: 1st Bar |
| Color: Blue |
Condition:
Symmetry:=.28;
Apex:=(H+L)/2;
WB:=Ref(H,-2)-Ref(L,-2);
Shark:=If((H<Ref(H,-1) AND L>Ref(L,-1) AND Ref(H,-1)<Ref(H,-2)
AND Ref(L,-1)>Ref(L,-2))=1,If(Apex <= (Ref(H,-2)-(WB*Symmetry))
AND Apex >= (Ref(L,-2)+(WB*Symmetry)) ,1,0),0);
Ref(Shark,+2)=1; |
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Symbols:
Click the Symbols tab, choose New and enter "Shark Buy" in the
Name field. Now enter the following formula in the Condition
field.
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Symmetry:=.28;
Apex:=(H+L)/2;
WB:=Ref(H,-2)-Ref(L,-2);
Shark:=If((H<Ref(H,-1) AND L>Ref(L,-1) AND Ref(H,-1)<Ref(H,-2)
AND Ref(L,-1)>Ref(L,-2))=1,If(apex <= (Ref(H,-2)-(WB*Symmetry))
AND Apex >= (Ref(L,-2)+(WB*Symmetry)) ,1,0),0);
Buyok:=Cross(C,ValueWhen(1,Shark=1,Ref(H,-2)));
Chk:=Cum(Buyok)-ValueWhen(1,Shark=1,Cum(Buyok));
ValidChk:=Alert(Shark=1,25); |
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{Note* The above ValidChk variable makes the Shark signal
valid for 25 periods. If the price does not cross above the High
value of the base within 25 periods, you will not receive a
signal. You can change the number of periods by changing 25 to the
number of periods you desire. *}
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Buy:= Buyok=1 AND Ref(Chk,-1)=0
AND ValidChk=1;
Buy; |
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Click the Graphic tab. Change the symbol in the Graphic field
to Buy Arrow. Now change the color in the Color field to Green.
Finally, type "Buy" in the Label field, and then choose OK.
Using the Same method as above, enter the following Symbol
formula.
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| Name: Shark Sell |
Condition:
Symmetry:=.28;
Apex:=(H+L)/2;
WB:=Ref(H,-2)-Ref(L,-2);
Shark:=If((H<Ref(H,-1) AND L>Ref(L,-1) AND Ref(H,-1)<Ref(H,-2)
AND Ref(L,-1)>Ref(L,-2))=1,If(apex <= (Ref(H,-2)-(WB*Symmetry))
AND Apex >= (Ref(L,-2)+(WB*Symmetry)) ,1,0),0);
Sellok:=Cross(ValueWhen(1,Shark=1,Ref(L,-2)),C);
Chk:=Cum(Sellok)-ValueWhen(1,Shark=1,Cum(Sellok));
ValidChk:=Alert(Shark=1,25); |
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{Note* The above ValidChk variable makes the Shark signal
valid for 25 periods. If the price does not cross below the Low
value of the base within 25 periods, you will not receive a
signal. You can change the number of periods by changing 25 to the
number of periods you desire. *}
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Sell:= Sellok=1 AND Ref(Chk,-1)=0
AND ValidChk=1;
Sell; |
| Symbol: Sell Arrow |
| Color: Red |
| Label: Sell |
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After you have finished creating the Symbol formulas, you can
attach the Expert to your chart by choosing Expert Advisor from
the Tools Menu. Select the Expert called "Shark – 32" from your
list of Experts, choose Attach, and then Close.
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