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John, Jay
I've looked again at SAR over the past few days and it pains me to admit
that while probably not impossible to implement in MFL (may be a snip in a
dll but I'm not a programmer) it is too difficult for me. By my reckoning
the PREV count could reach 30 or beyond and the exercise seems rather
pointless.
Roy
----- Original Message -----
From: <JayTownsend@xxxxxxx>
To: <equismetastock@xxxxxxxxxxxxxxx>
Sent: Sunday, June 29, 2003 10:00 AM
Subject: Re: [EquisMetaStock Group] SAR formula
> In a message dated 6/28/2003 2:05:50 PM Pacific Daylight Time,
> Sacz@xxxxxxxxxxxxx writes:
>
> > Can anyone give me the formula for the parabolic SAR. I realize it's
> > a canned formula in MetaStock but I would like to use it as a "P"
> > function. As it is, I can not use it on an indicator in a system
> > test. I have version 6.52.
> >
> > TIA
> >
> > John
> >
> >
>
> Hi John:
>
> This has come up before and I don't believe anyone found the MetaStock
> formula. I did copy the logic from Wells Wilder's book though and am
listing it
> below. Wilder did not include a formula in his book, only the following
logic
> and pages of entries from the logic. The system is always in the market
and the
> question always arises as to where do you start. It doesn't make any
> difference. Pick any entry point, long or short, and feed it into the
system. The
> MetaStock SAR appears to follow Wilder's logic. When following it I
always
> ignored the first two entry/exits (you exit and enter at the same point),
and
> went from there. It is too whiplash for me.
>
> Jay
>
> RULES
>
> PARABOLIC TIME/PRICE SYSTEM
>
> 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 S!P (Significant
> Point).
> 1. If entered Long the SIP is the lowest price reached while in the
previous
> Short trade.
> 2. If entered Short, the SIP is the highest price reached while in the
> previous Long trade.
>
> B. For the second day and thereafter, the SAR is calculated as follows:
> 1. If Long:
> a. Find the difference between the highest price made while in the trade
and
> the SAR for to-
> day. Multiply the difference by the AF and add the result to the SAR today
to
> obtain the SAR
> for tomorrow.
> b. Use .02 for the first AF and increase its value by .02 on every day
that a
> new high for the
> trade is made. If a new high is not made, continue to use the AF as last
> increased. DO NOT
> INCREASE THE AF ABOVE .20.
> 2. If Short:
> a. Find the difference between the lowest price made while in the trade
and
> the SAR for today.
> Multiply the difference by the AF and subtract the result from the SAR
today
> to obtain the
> SAR for tomorrow.
> b. Use .02 for the first AF and increase its value by .02 on every day
that a
> new low for the
> trade is made. If a new low is not made, continue to use the AF as last
> increased DO NOT
> INCREASE THE AF ABOVE .20.
>
> C. Never move the SAR into the previous day's range or today's range.
> 1. If Long, never move the SAR for tomorrow above the previous day's low
or
> today's low. If the
> SAR is calculated to be above the previous day's low or today's low, then
use
> the lower low
> between today and the previous day as the new SAR. Make the next day's
> calculations based
> upon this SAR.
> 2. If Short, never move the SAR for tomorrow below the previous day's high
or
> today's high. If the
> SAR is calculated to be below the previous day's high or today's high,
then
> use the higher high
> between today and the previous day as the new SAR. Make the next day's
> calculations based
> upon this SAR.
>
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