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APE Alpha i get a log overflow error.
How do you fix this??
--- In equismetastock@xxxxxxxxxxxxxxx, "Jose Silva"
<josesilva22@xxx> wrote:
>
> The posted default Average Peak Excursion formula is the same as:
>
> Max(H-O,O-L)
>
> ...which is basically measuring the inverse relationship of the
Open
> to the bar's range (H-L). Increasing the original indicator's
periods
> just increases the measured period range.
>
> To average the "Peak Excursion", I would do this:
>
> pds:=Input("Averaging periods for APE",1,260,21);
> Mov(Max(H-O,O-L),pds,S)
>
>
> I guess that the author intends to measure bar peak excursions
(aka Dr
> Elder's kangaroo tails) as measured from the Open, but I would
prefer
> to measure this from the (arguably more valid) Close.
>
>
> jose '-)
> http://www.metastocktools.com
>
>
>
> --- In equismetastock@xxxxxxxxxxxxxxx, biobuck <no_reply@> wrote:
> >
> > Am I the only one think that the Metastock code published is
> > incorrect?
> >
> > I don't see the code did anything to "AVERAGE" the peak excursion
> > for a given data series. Could anyone please confirm this?
> >
> > Thanks!
> >
> > biobuck
> >
> >
> >
> >
> > METASTOCK: AVERAGE PEAK EXCURSION (APE)
> >
> > Chris Young's article in this issue, "The Average Peak
Excursion,"
> includes three formulas for calculating the rate of return. These
> formulas are listed below as indicators.
> >
> > To enter these indicators into MetaStock, follow these steps:
> >
> > 1. In the Tools menu, select Indicator Builder.
> > 2. Click New to open the Indicator Editor for a new indicator.
> > 3. Type the name of the formula.
> > 4. Click in the larger window and type in the formula.
> > 5. Click OK to close the Indicator Editor.
> > Name: Average Peak Excursion
> > Formula:
> > x:=Input("number of periods for APE",1,200,1);
> > Max( Abs(HHV(H, x) - Ref(O, -(x-1))), Abs(LLV(L, x) - Ref(O, -(x-
1)
> )) )
> > Name: APE ratio
> > Formula:
> > x:=Input("number of periods for APE ratio",2,200,25);
> > ax:= Max( Abs(HHV(H, x) - Ref(O, -(x-1))), Abs(LLV(L, x) - Ref
(O, -
> (x-1))) );
> > a1:= Max( Abs(H - O), Abs(L - O) );
> > ax / a1
> > Name: APE Alpha
> > Formula:
> > x:=Input("number of periods for APE",2,200,25);
> > ax:= Max( Abs(HHV(H, x) - Ref(O, -(x-1))), Abs(LLV(L, x) - Ref
(O, -
> (x-1))) );
> > a1:= Max( Abs(H - O), Abs(L - O) );
> > Log( ax / a1 ) / Log( x )
> >
> > These formulas can also be used in explorations, but the first
line
> will need to be changed first. The Input() function only works in
> indicators. For the explorations, replace this line:
> >
> >
> > x:=Input("number of periods for APE",2,200,25);
> > with this line:
> > x:= 25;
> >
> > The number typed in after x is the number of periods used for
the
> long-term Ape calculation and can be any value desired.
> >
> >
> > --William Golson
> > MetaStock Support Representative
> > Equis International (A Reuters Company)
> > 801 265-9998, www.metastock.com
> >
>
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