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Basically PFC is calculated in the loops. PFO = PFC +/- Box depending
on direction
Yes you can I I could have posted a variable box size P&F code at the
yahoo group files. (I think as it was some time ago now) It was with
older versions of AFL so not as flexible as now.
I also went beyond P&F with what I called KS chart which has fully
varying unit size based on recent volatility of the chart. The only
thing was I had to forgo the XO structure as that relies on single
size boxes.
On Mon, 21 Feb 2005 10:40:04 -0000, the_short_fox <theshortfox@xxxxxxxxx> wrote:
>
>
> Graham,
>
> Thank you for the detailed answer.
> I'm starting to understand the synthax of AFL, much because of your
> assistance. Thanks.
>
> If you won't mind, your post raises another question: you mentioned
> that PFC stands for closing prices and PFO is for "opening" prices
> (one box behind, up or down). My question is, what happens if the
> boxsize varies? How does AmiBroker handles such a situation where
> the boxsize changes as a function of increasing (or decreasing)
> prices? Can I plot in AmiBroker a custom-PF array, which is based on
> a varying boxsize?
>
> Thanks again for the updated PF code.
>
> Short.
>
> --- In amibroker@xxxxxxxxxxxxxxx, Graham <kavemanperth@xxxx> wrote:
> > Hi I will attempt to explain what I can, but firstly if the code
> > contains jscript then you must have an old version. I have reworked
> > the PF code to native AFL loops and you can find this in AFL
> library
> > on AB site. Using Jscript was the original method to use looping in
> > AFL.
> >
> > PFO and PFC are intermediate variables allowing for the value of
> close
> > price (PFC) to be calculated within the loop. PFO is just 1 box
> size
> > behind PFC.
> > Delta allows for the number of final columns of the PF chart to be
> > moved to the right end of the background bar chart. It is not
> possible
> > to change the X axis on the charts which always remain the same
> number
> > of bars as the underlying symbol data.
> >
> > In the plot I use basic prices, but you may notice the OHLC have
> been
> > re-assigned values as calculated from PFO & PFC.
> >
> > Yes, have a look at what I produced and placed on AB site
> > http://www.amibroker.com/library/detail.php?id=348
> > there are also some older versions, just search the library for P&F
> >
> >
> > On Sun, 20 Feb 2005 14:45:18 -0000, the_short_fox
> > <amiteh@xxxx> wrote:
> > >
> > >
> > > Hi Graham et al,
> > >
> > > As a programmer in a different language, who's a new AmiBroker
> user,
> > > I would be thankful if you provide some commentary (here), with
> > > regards to variables/declarations in the P&F code published by
> you.
> > > This way, I hope I'll be able to learn AFL better. Would you
> mind if
> > > I ask several questions?
> > >
> > > (i) what do PFO and PFC arrays represent?
> > > (ii) what does delta variable represent?
> > > (iii) what is Jscript and why is it being used?
> > > (iv) In the "Plot" function, why is C array used for plotting? As
> > > far as I understand (I guess I don't, currently) C stands for the
> > > closing prices of "regular" time-interval bars
> (daily/weekly/monthly
> > > etc), not P&F columns (which are time independent). I would be
> happy
> > > if you can clarify a little.
> > > (v) Last question, if you won't mind: is there any way to
> construct
> > > a type/record in AmiBroker? i.e, a single varibale that contains
> > > several sub-variables. I specifically refer to something like
> this:
> > >
> > > Type Column=record
> > > // Storing information for every 'X' or 'O' column
> > > // Assuming a maximum of 200 boxes per column
> > > Sort: integer; // 'X' ---> 1 ; 'O' ---> 0
> > > MaxPFValue: float; // Highest price for the column (P&F
> > > perspective)
> > > MinPFValue: float; // Lowest price for the column (P&F
> perspective)
> > > First: integer; // Starting date for the whole column
> > > Last: integer; // Ending date for the whole column
> > > end;
> > >
> > > As a programmer that is (still) unfamiliar with the synthax of
> AFL,
> > > I take this opportunity to thank you in advance for any
> assistance.
> > >
> > > Short.
> > >
> > >
> > > Check AmiBroker web page at:
> > > http://www.amibroker.com/
> > >
> > > Check group FAQ at:
> http://groups.yahoo.com/group/amibroker/files/groupfaq.html
> > > Yahoo! Groups Links
> > >
> > >
> > >
> > >
> > >
> >
> >
> > --
> > Cheers
> > Graham
> > http://e-wire.net.au/~eb_kavan/
>
>
> Check AmiBroker web page at:
> http://www.amibroker.com/
>
> Check group FAQ at: http://groups.yahoo.com/group/amibroker/files/groupfaq.html
> Yahoo! Groups Links
>
>
>
>
>
--
Cheers
Graham
http://e-wire.net.au/~eb_kavan/
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