M. H. Pee's article, "Trend Trigger Factor," introduces an indicator of the same name. The formula for this indicator and the steps to include it into MetaStock are below:

To enter this indicator into MetaStock:

<li>In the Tools menu, select Indicator Builder. <li>Click New to open the Indicator Editor for a new indicator. <li>Type the name of the formula. <li>Click in the larger window and type in the following formula.

Name: Trend Trigger Factor

Formula:

x:=Input("number of periods",2,100,15);
bp:=HHV(H,x)-Ref(LLV(L,x),-x);
sp:=Ref(HHV(H,x),-x)-LLV(L,x);
((bp-sp)/(0.5*(bp+sp)))*100

As Mr. Pee's article also included the signals to trade this indicator, it is possible to construct a system test and an expert advisor for it. These formulas and the procedure for creating them follow.

To create the system test:

<li>In the Tools menu, select the Enhanced System Tester <li>Click New to open the system tester editor <li>Select the Buy Order tab and insert this formula:

x:=15;
bp:=HHV(H,x)-Ref(LLV(L,x),-x);
sp:=Ref(HHV(H,x),-x)-LLV(L,x);
ttf:=((bp-sp)/(0.5*(bp+sp)))*100;
Cross(ttf,100)


<li>Select the Sell Order tab and insert this formula:

x:=15;
bp:=HHV(H,x)-Ref(LLV(L,x),-x);
sp:=Ref(HHV(H,x),-x)-LLV(L,x);
ttf:=((bp-sp)/(0.5*(bp+sp)))*100;
Cross(-100,ttf)


<li>Select the Sell Short Order tab and insert this formula:

x:=15;
bp:=HHV(H,x)-Ref(LLV(L,x),-x);
sp:=Ref(HHV(H,x),-x)-LLV(L,x);
ttf:=((bp-sp)/(0.5*(bp+sp)))*100;
Cross(-100,ttf)


<li>Select the Buy to Cover Order tab and insert this formula:

x:=15;
bp:=HHV(H,x)-Ref(LLV(L,x),-x);
sp:=Ref(HHV(H,x),-x)-LLV(L,x);
ttf:=((bp-sp)/(0.5*(bp+sp)))*100;
Cross(ttf,100)

Click Ok to close the editor.

To create the expert advisor:

<li>In the Tools menu, select the Expert Advisor <li>Click New to open the expert editor <li>Select the Highlights tab <li>Click New to make a new highlight <li>Enter the name as: Long <li>Set the color to Green <li>Enter the following formula for the condition:

x:=15;
bp:=HHV(H,x)-Ref(LLV(L,x),-x);
sp:=Ref(HHV(H,x),-x)-LLV(L,x);
ttf:=((bp-sp)/(0.5*(bp+sp)))*100;
ttf>100


<li>Click ok to close the highlight editor <li>Repeat steps 4-8 to make the short highlight listed below

Name: Short

Color: Red

Condition:

x:=15;
bp:=HHV(H,x)-Ref(LLV(L,x),-x);
sp:=Ref(HHV(H,x),-x)-LLV(L,x);
ttf:=((bp-sp)/(0.5*(bp+sp)))*100;
ttf<-100


<li>Select the Symbols tab <li>Click New to make a new symbol <li>Enter the name as Buy <li>Enter the following formula for the condition:

x:=15;
bp:=HHV(H,x)-Ref(LLV(L,x),-x);
sp:=Ref(HHV(H,x),-x)-LLV(L,x);
ttf:=((bp-sp)/(0.5*(bp+sp)))*100;
Cross(ttf,100)


<li>Select the Graphics tab <li>Set the symbol to the up arrow and the color to green <li>Click Ok to close the symbol editor <li>Repeat steps 11-16 to make the sell symbol listed below

Name: Sell

Condition:

x:=15;
bp:=HHV(H,x)-Ref(LLV(L,x),-x);
sp:=Ref(HHV(H,x),-x)-LLV(L,x);
ttf:=((bp-sp)/(0.5*(bp+sp)))*100;
Cross(-100,ttf)


Symbol: Sell Arrow

Color: Red

<li>Click OK to close the expert editor

William Golson
Equis International