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Herbert,
thank you for the explanation.
The fractal you describe is a set of n [orange] bars,where the 3rd of
them is the highest.
Of course it looks [strongly] into the future and I really wonder for
its use.
Anyway, here is the ind. builder code.
fractalwidth=5; //calibrate the width here
cond1=Ref(H,3-fractalwidth)==HHV(H,fractalwidth);
fractal=BarsSince(Ref(Cond1,-1+fractalwidth))<fractalwidth ;
Plot(C,"",fractal*colorRed+1,64);
PlotShapes(shapeDownArrow*Ref(Cond1,-3+fractalwidth),colorRed);//the
fractal peak
PlotShapes(shapeUpTriangle*Cond1,colorOrange);//the fractal exit
The fractal is known at the [orange triangle] exit.
The
Filter=Cond1;
will help to search for already formatted fractals.
Dimitris Tsokakis
--- In amibroker@xxxxxxxxxxxxxxx, harveyhp <harveyhp@xxxx> wrote:
> May I butt in here since this is something I'm presently having
trouble
> with. This has nothing to do with a fractal that Mandelbrot might
> recognise. Rather it comes from a system with exaggerated claims
and
> gimmicky names in a book "New Trading Dimensions" by Bill
Williams. He
> applies the term "fractal" to a pattern of price bars resembling
the
> fingers of a hand, with a higher high in the middle and two lower
highs on
> either side. The lower highs don't have any particular
relationship to
> each other. The basic five-bar group is easily hard-coded.
However there
> is a more generalised version that allows for any number of
subsequent
> intervening bars of equal height to that first highest high; the
> requirements are that the first highest high must be preceded by
two lower
> highs and followed (but not necessarily immediately) by two lower
highs
> which are not necessarily adjacent to one another. Of course there
is a
> mirror image to the downside. The trick is to identify that first
highest
> high and plot a shape over it. Given some other conditions, a buy
is
> indicated after the fractal is completed by the second low bar and
a
> subsequent high takes out the high of the fractal.
>
> In 2001 Steve Wiser coded the system and placed it in the AB
Library with
> the formula names:
> - Williams Alligator System
> - AO+ Momentum Indicator.
> - AC+ Acceleration
> He coded only the basic five-bar fractal, and of course AFL is more
> versatile now than it was then. But the coding of the generalised
fractal
> still defeats me.
> HHP
> ======================
>
> At 11:57 AM 05/12/2003, you wrote:
> >Herbert,
> >Ref(H,-2) is the High two bars ago.
> >HHV(H,5)is the highest of the last 5 bars.
> >Ref(H,-2)==HHV(H,5) is true whenever the above two values are
equal.
> >Nothing peculiar, at least up to this level.
> >BTW, in what sense "fractal" ?
> >Dimitris Tsokakis
> >
> >
> >--- In amibroker@xxxxxxxxxxxxxxx, Herbert Elstein <herty@xxxx>
wrote:
> > > Dimitris,
> > >
> > > Won't cond1 give you a high that's higher than the next coming 5
> >days? What
> > > epintoem is asking for is a "fractal" I believe.
> > >
> > > Herbert
> > > ----- Original Message -----
> > > From: "DIMITRIS TSOKAKIS" <TSOKAKIS@xxxx>
> > > To: <amibroker@xxxxxxxxxxxxxxx>
> > > Sent: Friday, December 05, 2003 4:10 PM
> > > Subject: [amibroker] Re: Code help - simple stuff
> > >
> > >
> > > > cond1=Ref(H,-2)==HHV(H,5);
> > > > cond2=Ref(L,-1)<ValueWhen(cond1,L);
> > > > cond3=Ref(L,-1)<ValueWhen(cond2,L);
> > > >
> > > > --- In amibroker@xxxxxxxxxxxxxxx, "epintoem" <epintoem@xxxx>
> >wrote:
> > > > > 1. Identify a high that is higher than the previous and
next two
> > > > > trading days.
> > > > > 2. Identify a previous bar low that is lower than the bar
> > > > identified
> > > > > in 1.
> > > > > 3. Identify a previous bar low that is lower than the bar
> > > > identified
> > > > > in 2.
> > > > >
> > > > > Any help will be appreciated
> > > >
> > > >
> > > >
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