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Fred,
If you take a closer look at the code
http://groups.yahoo.com/group/amibroker/message/59058
You will see the technique of CenterMA or Percentage Based Widths.
Ref(array,t) is used with t>0.
As you know, t>0 looks into the future.
Since the Ref(array,t) is used many times, we have a combination
of "looking-into-the-future" functions.
The code is correct, you can not Center an MA else.
The result of the repeated use of functions of the future is clear at
http://www.purebytes.com/archives/amibroker/2003/msg26466.html
gifs.
Some arrays of the code mix a Ref(array1,+100) with a Ref(array2,+50)
etc.
You can not limit these functions to the present, the code will not
work at all without future refernces.
As for the possible use, far from technical descriptions, the
situation is like this:
After last Friday Feb20 close you have, for example, a BUY signal to
be executed on the very next Open. You put your money and buy on
Monday, Feb23 and after 10 bars you are informed that you should buy
on Tue Feb17 and, the worse, your Feb20 signal does not exist
anymore !!!!![The signals of the past are ...corrected!!!]
This is pure nonsense and I really wonder what are we talking about.
Dimitris Tsokakis
PS. Day by day, as new data are added, the signals of the past are
corrected and after 6 months this face lifting will make the signals
better. After 18 months the signals will be nearly perfect, as Ace
pointed out from his first announcement...
--- In amibroker@xxxxxxxxxxxxxxx, "Fred" <ftonetti@xxxx> wrote:
> Dimitris,
>
> Whether for the purposes of mechanical or discretionary analysis
and
> trading, I would agree that being able to look at how this or any
> other indicator "performed" or "what it told us" in the past is
> important in order to have some idea of what to expect from it in
the
> future.
>
> I have not looked at Ace's code in detail. However, if what it is
> doing is some form of interpolation if you will then the way to
> correct this in order to develop plotable historical data points
> would be to limit the scope of the calculations for each point
along
> the array to data which has already occured.
>
> This is doable and not all that painful in the scope of AB/AFL.
>
> Fred
>
> --- In amibroker@xxxxxxxxxxxxxxx, "DIMITRIS TSOKAKIS"
<TSOKAKIS@xxxx>
> wrote:
> > Fred,
> > The results of my research [at least using Ace code] are totally
> > negative. Signals of the past depend on new data. Have you met
any
> > application without this terrific "bug" ?
> > Dimitris Tsokakis
> > --- In amibroker@xxxxxxxxxxxxxxx, "Fred" <ftonetti@xxxx> wrote:
> > > Does it work is a very general question that is difficult to
> field.
> > >
> > > However, IMHO Hurst's work does have value to it.
> > >
> > > --- In amibroker@xxxxxxxxxxxxxxx, "wavemechanic" <wd78@xxxx>
> wrote:
> > > >
> > > > ----- Original Message -----
> > > > From: DIMITRIS TSOKAKIS
> > > > To: amibroker@xxxxxxxxxxxxxxx
> > > > Sent: Tuesday, February 17, 2004 7:30 AM
> > > > Subject: [amibroker] Re: Sigma Bands
> > > >
> > > >
> > > > BTW, since the greater part of Sigma bands is without use,
an
> > > idea of
> > > > adjustable Displaced MA may be useful, as exposed at
> > > > http://groups.yahoo.com/group/amibroker/message/59001
> > > > I believe there are many ways to Rome.
> > > >
> > > > A displaced MA is not the same as the required
extrapolation.
> > > >
> > > > Dimitris Tsokakis
> > > > --- In amibroker@xxxxxxxxxxxxxxx, "wavemechanic"
<wd78@xxxx>
> > > wrote:
> > > > >
> > > > > ----- Original Message -----
> > > > > From: Fred
> > > > > To: amibroker@xxxxxxxxxxxxxxx
> > > > > Sent: Monday, February 16, 2004 10:57 PM
> > > > > Subject: [amibroker] Re: Sigma Bands
> > > > >
> > > > >
> > > > > It should also be no surprise that the examples look
> > > wonderful.
> > > > >
> > > > > After all couldn't we easily put up a dozen examples of
a
> > > MACD
> > > > > Histogram divergence that looked wonderful ?
> > > > >
> > > > > The question is does Sigma/Hurst work? There are at
> least
> > > four
> > > > (as I recall) sources for services and software available
so
> > one
> > > can
> > > > pick and choose, or write your own (as some traders have
> shown
> > > that
> > > > they have done). And there are traders that claim that
this
> > > approach
> > > > is helpful to them and that's the bottom line.
> > > > >
> > > > > --- In amibroker@xxxxxxxxxxxxxxx, Wayne Skerritt
> > > <ecodesign@xxxx>
> > > > > wrote:
> > > > > > wavemechanic wrote:
> > > > > > > **
> > > > > > >
> > > > > > > ----- Original Message -----
> > > > > > > *From:* DIMITRIS TSOKAKIS <mailto:TSOKAKIS@x...>
> > > > > > > *To:* amibroker@xxxxxxxxxxxxxxx
> > > > > <mailto:amibroker@xxxxxxxxxxxxxxx>
> > > > > > > *Sent:* Monday, February 16, 2004 8:27 AM
> > > > > > > *Subject:* [amibroker] Re: Sigma Bands
> > > > > > >
> > > > > > > Among the others, take a look at
> > > > > > > http://www.traderiskmanagement.com/warning.htm
> > > > > > > !!!!!
> > > > > > > What is so important for these bands??
> > > > > >
> > > > > > Simple.... someone on this list was asking for
> > information
> > > and
> > > > > ideas
> > > > > > regarding Sigma Bands. Many responded with
interesting
> > code
> > > > ideas
> > > > > and
> > > > > > questions. For my part, I offer no warranty nor ideas
> as
> > to
> > > how
> > > > the
> > > > > info
> > > > > > might be used or traded. Readers can take it or leave
> it.
> > > 8^)
> > > > > >
> > > > > > Regarding the above URL and the message on that
> site.....
> > > it
> > > > should
> > > > > not
> > > > > > surprise anyone that the owner should claim to be the
> one
> > > and
> > > > only
> > > > > > 'interpreter' of Hurst's secrets.... the one true way.
> > > > > >
> > > > > > Wayne
> > > > >
> > > > >
> > > > >
> > > > >
> > > > > Send BUG REPORTS to bugs@xxxx
> > > > > Send SUGGESTIONS to suggest@xxxx
> > > > > -----------------------------------------
> > > > > Post AmiQuote-related messages ONLY to:
> > > amiquote@xxxxxxxxxxxxxxx
> > > > > (Web page:
> http://groups.yahoo.com/group/amiquote/messages/)
> > > > > --------------------------------------------
> > > > > Check group FAQ at:
> > > > http://groups.yahoo.com/group/amibroker/files/groupfaq.html
> > > > > Yahoo! Groups Links
> > > >
> > > >
> > > >
> > > >
> > > > Send BUG REPORTS to bugs@xxxx
> > > > Send SUGGESTIONS to suggest@xxxx
> > > > -----------------------------------------
> > > > Post AmiQuote-related messages ONLY to:
> > amiquote@xxxxxxxxxxxxxxx
> > > > (Web page: http://groups.yahoo.com/group/amiquote/messages/)
> > > > --------------------------------------------
> > > > Check group FAQ at:
> > > http://groups.yahoo.com/group/amibroker/files/groupfaq.html
> > > > Yahoo! Groups Links
Send BUG REPORTS to bugs@xxxxxxxxxxxxx
Send SUGGESTIONS to suggest@xxxxxxxxxxxxx
-----------------------------------------
Post AmiQuote-related messages ONLY to: amiquote@xxxxxxxxxxxxxxx
(Web page: http://groups.yahoo.com/group/amiquote/messages/)
--------------------------------------------
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