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Neo
I'm not sure if my last response to you got through the list server. I got
some mail back as undelivered. I'll say thank you for the SAR information
again anyway. I've had a brief look at it and I can see why you think it may
be un-codable. I'll probably be of the same opinion after a little more head
scratching.
Regards
Roy
> Wilder designed this to give a price for the next trading day in real
time.
> If the price is hit then the current position is closed at that price and
a
> position is opened in the opposite direction at that price. Wilder did not
> design it as an EOD stop.
>
> Where I suspect that MetaStock does not follow Wilder is in rules B and C
> although I do not know since I do not have the code for their SAR.
>
> neo
>
>
> -----Original Message-----
> From: owner-metastock@xxxxxxxxxxxxx
> [mailto:owner-metastock@xxxxxxxxxxxxx]On Behalf Of DAVID H. LINTON
> Sent: Monday, May 06, 2002 8:32 AM
> To: metastock@xxxxxxxxxxxxx
> Subject: Re: Parabolic SAR - Wilder's Original Definition
>
>
> Neo, thanks for the SAR formula details from Wilder's book. This is what I
> was looking for in my original SAR post.
> Roy, using these details I have checked out a few of MetaStocks SAR
> calculations and conclude that their calculation method is accurate.
> Accurate, yes, but correct, I'm not so sure.
> The key thought for the MS approach is that, with today's results, the SAR
> point that MS will plot on tomorrow's bar is calculated but not shown on
the
> chart. It is not shown because it could change if the SAR line changed
from
> one direction to the other.
> Perhaps, Neo, you can tell us if this is what Wilder intended?
> Why not simply back the line up one day?
> David
>
> ----- Original Message -----
> From: "Roy Larsen" <rlarsen@xxxxxxxxxxxxxx>
> To: <DEFANGED_metastock@xxxxxxxxxxxxx>
> Sent: May 5, 2002 6:18 PM
> Subject: Re: Parabolic SAR - Wilder's Original Definition
>
>
> > Hi Neo
> >
> > Thanks for the information. I don't expect to be able to get as far as
you
> > have even, but it's a challenge that I can put aside for a rainy day.
I'll
> > post results if I come up with anything.
> >
> > Regards
> >
> > Roy
> >
> > > Although I do not post much, my knowledge of MetaStock programming is
> > fairly
> > > extensive. I would love to see you do it.
> > >
> > > I have Wilder's book here. It was written for the days of handwritten
> > charts
> > > and I am amazed at his book.
> > >
> > > Roy, there were several problems as I recall:
> > > 1. Initialization. I am not always in a trade in a particular
security.
> As
> > I
> > > recall, I used either the HHV or LLV (depending on long or short) for
2
> > > days.
> > > 2. I was unable to program the rules for B & C in the MetaStock
formula
> > > language because of the lack of global variables and the lack of a
> simple
> > > If-Then statement instead of the If-Then-Else.
> > >
> > > My very best wishes. Let me know how you do or if there is anything I
> can
> > do
> > > to help.
> > >
> > > neo
> > >
> > > _____________________________________________
> > >
> > > Wilder's SAR
> > >
> > > FORMULA
> > >
> > > SAR[tomorrow]=SAR[today] + AF * (EP[trade]-SAR[today]
> > >
> > > DEFINITIONS
> > >
> > > SIP=the extreme price point while in the previous trade
> > > AF=begins at .02 and is increased (depending on the rules below) by
.02
> > per
> > > day until .20
> > > AF is never increased beyond .20
> > > EP[trade]=Extreme Price Point for the trade made so far
> > > If long, the extreme high price for the trade
> > > If short, the extreme low price for the trade
> > >
> > > RULES
> > >
> > > ENTRY
> > >
> > > A position is entered when a price penetrates the SAR
> > >
> > > STOP AND REVERSE (SAR)
> > >
> > > A. For the first day of entry, the SAR is the previous SIP
> > > 1. If long, the lowest price while in the previous short trade
> > > 2. If short, the highest price while in the previous long trade
> > >
> > > B. For the second day and thereafter
> > > 1. Long - use the formula above but only increase the AF on days when
a
> > new
> > > high for the trade is made
> > > 2. Short - use the formula above but only increase the AF on days when
a
> > > new low for the trade is made
> > >
> > > C. Never move the SAR into the previous day's or today's range.
> > > 1. Long - never move the SAR for tomorrow above the previous day's or
> > > today's low. If the SAR is above then use the lower low between today
> and
> > > the previous day as the new SAR. Make the next day's calculations
based
> on
> > > this SAR.
> > > 1. Short - never move the SAR for tomorrow below the previous day's or
> > > today's high. If the SAR is above then use the higher high between
today
> > and
> > > the previous day as the new SAR. Make the next day's calculations
based
> on
> > > this SAR.
> > > ____________________________________________
> > >
> > >
> > > Neo
> > >
> > > > I have found it impossible to properly program the SAR as described
by
> > > > Wilder with MetaStock's formula language. I can in Excel. I believe
> the
> > MS
> > > > indicator is not programmed properly.
> > >
> > > Could you possibly post the text for the SAR composition so I can take
a
> > > look?
> > >
> > > Thanks
> > >
> > > Roy
> > >
> > >
> > >
> > >
> > >
> >
> >
>
>
>
>
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