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Hi Preston
You're too kind. In reality I probably just spend more time pushing MetaStock's boundaries and as a result stumble into new territory from time to time. As I mentioned in the newsletter, using an N/A output to allow a sections of a scaled-to-price indicator to "float" out of view was an idea that only came into focus while I was studying one of your formulas. Thanks for the one idea that completed the concept.
I'm not sure if Rick realizes that the main focus of my post was towards the "two-color" method and not the Parabolic SAR. The method is about being able to plot almost any indicator in two or more colours. The one catch is that the method can really only be applied to dot and histogram styles.
Regards
Roy
----- Original Message -----
From: pumrysh
To: equismetastock@xxxxxxxxxxxxxxx
Sent: Thursday, November 01, 2007 5:33 AM
Subject: Re: [EquisMetaStock Group] Parabolic SAR...Two Color
All,
I hope everyone realizes how significant this indicator is!
Prior to this we would typically play hide the value.
RedGreen Histogram is a good example:
{RedGreen Histogram}
X:= {your indicator here};
Green:=If(X>Ref(X,-1),X,0);
Red:=If(X<Ref(X,-1),X,0);
Green; Red;
The indicator works because 0 is a value used in the display. In the
case of the Two-Color SAR though you will notice that we have no
negative indicator values.
Roy recently shared the process with those members of his newsletter
in the form of another indicator. The indicator that he used was the
Heikin-Ashi. The HA requires that you display values for the close
and open that are different than the data for the day/period. Roy's
indicator allows you to do this without a DLL or transposing the
values in Excel. This is just the type of insightful information
that you can expect to receive with the every issue of the
publication. If you are not a subscriber then I would strongly
consider it.
As far as the indicator, this is just the tip of the iceburg when it
comes to its use. Roy and I have found uses for it that others
thought impossible. In Roy's case I consider it genius. Mine was
just luck. Either way ValueWhen is one of those gems that can be
used to create some really interesting charts.
If you run across some other ideas for its use or just have some
proposals that you would like to consider, please share them.
Preston
--- In equismetastock@xxxxxxxxxxxxxxx, "Roy Larsen" <rlarsen@xxx>
wrote:
>
> Daniel
>
>
>
> There is a way to plot SAR() with different colors for up and
down. This method is really only workable with a dotted line style -
and not with a solid line style. A dotted line only plots on each
bar and does not connect between bars. That allows the transition
from "zero to active" or "active to zero" to remain hidden. A solid
line cannot hide that transition.
>
>
>
> The following formula generates two SAR outputs. The first output
plots the SAR when it is less than CLOSE, otherwise it plots zero.
The second output plots the SAR when it is greater than CLOSE,
otherwise it plots zero. Each plot can be given the color and style
of your choice. Remember that a dotted line works best because of
the "transition" problem with a solid line.
>
>
>
> If no other outputs were included in the formula then scaling the
indicator to price would allow the zero segments of each plot to
severely distort or compress the price bars. This problem is
overcome by adding an N/A output as the LAST output from the
indicator. I've used ValueWhen(1,0=1,0) to create this output. This
output can never be valid because 0 (zero) is never equal to 1
(one), and I'm using "0=1" is the (non-existent) trigger expression.
The indicator still remains "scaled" to the price chart but the
unwanted zero dots are allowed to "float" and disappear from the
viewing window. Once the indicator has been floated price bars can
again use the full height of the inner window.
>
>
>
> In the event that the zero dots reappear at the bottom of the
window on some charts, and this can happen, an extra valid zero line
can be created. Giving this zero line a heavy dotted style and the
same color as the chart background will effectively blank out any
zero SAR plots that might come into view.
>
>
>
> Obviously this indicator cannot plot as required when first
dropped onto a chart - it requires each plot be given the correct
style and color. If you wanted to use this on every chart then you
should set up the indicator and then save it as part of your default
template. That way the two-color SAR will plot correctly as soon as
you open each chart.
>
>
>
> {Two-Color SAR}
>
> A:=Input("Step value", 0.001,1,0.02);
>
> B:=Input("Maximum value",0.01,1,0.2);
>
> R:=SAR(A,B);
>
> If(R<C,R,0);
>
> If(R>C,R,0);
>
> {0;}
>
> ValueWhen(1,0=1,0);
>
>
>
> Hope this helps. Please let me know if you have any problems
making this work.
>
>
>
>
>
> Regards
>
>
>
> Roy
>
> www.metastocktips.co.nz
>
>
>
>
>
> ----- Original Message -----
> From: danielteokh
> To: equismetastock@xxxxxxxxxxxxxxx
> Sent: Tuesday, October 30, 2007 1:10 PM
> Subject: [EquisMetaStock Group] Parabolic SAR
>
>
> Hi,
>
> How can i plot PARABOLIC SAR and make it more colorful, showing
> different color for up and down ?
>
> Thanks.
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