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Re: [amibroker] Re: Fractal - was Code help - simple stuff



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Thank you once again Dimitris.  (HHP here - I hijacked the thread
from Herbert).  This is an approach I hadn't even considered, so
thank you also for the lesson.  You are a great teacher.
HHP
=======================
At 06:54 AM 06/12/2003, you wrote:
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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