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It is the closest approximation using ROC(x, 1).
If the user wants to get closer another approach has to be used. Is
the shortest secant good enough? Only the user
knows.
Bill
----- Original Message -----
Sent: Wednesday, July 18, 2007 4:59
PM
Subject: [amibroker] Re: How to measure slope of
MA
>
Bill, Ara, & Kar,
> I think we are all talking about the same thing,
just using different
> words/formulas:
>
> Slope = (line -
Ref(Line,-x) ) / Ref(Line,-x);
> is identical to
> Slope =
ROC(line,x)/100;
> if you replace line with 50-day MA you get
>
Slope = ROC(MA(C,50),x)/100:
> if you remove the % scaling factor you
get
> Slope = ROC(MA(C,50),x);
> The smaller that "x" is, the closer
the secant approaches the tangent.
> Therefore
> S50 =
ROC(MA(C,50),1);
> is the closest approximation of the tangent slope of
the MA.
>
> The key to distinguishing between the secant and the
tangent values
> to make sure the difference is measured over the
smallest possible
> distance, which is 1 bar.
>
>
>
--- In amibroker@xxxxxxxxxxxxxxx, "Ara
Kaloustian" <ara1@xxx> wrote:
>>
>> Slope of any line
is
>>
>> Slope = (line - Ref(Line,-x) ) /
Ref(Line,-x);
>>
>> where x is whatever length you choose (1
or larger)--- In
> amibroker@xxxxxxxxxxxxxxx,
"kar_avi" <kar_avi@xxx> wrote:
>>
>> --- In
amibroker@xxxxxxxxxxxxxxx,
"wavemechanic" <fimdot@> wrote:
>>
>> sorry for the
delay in replying. you are absolutely right
>> wavemechanic. I am
looking at the tangent to determine a few things
>> like the strength
of the trend, the steepness (to research more on
>> sustainability),
and the overall trend in 3 different timeframes.
>>
>>
thanks
>>
>> >
>> > You are assuming that the
questioner is after the secant as
> opposed
>> to the
tangent. This simple approximation might be what the
>>
questioner had in mind but we don't know without his input.
>> >
>> > Bill
>> >
>> > -----
Original Message -----
>> > From: "Ron Rowland"
<rowland@>
>> > To: <amibroker@xxxxxxxxxxxxxxx>
>> > Sent: Tuesday, July 17, 2007 6:26 PM
>>
> Subject: [amibroker] Re: How to measure slope of MA
>> >
>> >
>> > > Measuring the slope of an MA provides
you with a way of
> determining
>> > > which way the MA
is headed and the strength of the trend.
>> > >
>> >
> The slope is essentially the one-day change in the MA. When
>
the
>> > > slope approaches zero the MA is flattening out and
could be
> about to
>> > > reverse direction.
>>
> >
>> > > Also, multiple crossings of a security through
a MA that has
> little
>> > > or no slope indicates a
trading range.
>> > >
>> > > S50 =
ROC(MA(C,50),1); // The 1-day slope of the 50-day MA
>> > >
>> > > --- In amibroker@xxxxxxxxxxxxxxx,
"wavemechanic" <fimdot@>
> wrote:
>> >
>>
>> > >> Since MA is a curve and not a straight line
what do you mean
> by the
>> > > slope? What
exactly are you trying to calculate and what
>> > >
approximations are you making?
>> > >>
>> >
>> Bill
>> > >>
>> > >> -----
Original Message -----
>> > >> From: "kar_avi"
<kar_avi@>
>> > >> To: <amibroker@xxxxxxxxxxxxxxx>
>> > >> Sent: Tuesday, July 17, 2007 2:00
PM
>> > >> Subject: [amibroker] How to measure slope of
MA
>> > >>
>> > >>
>> >
>> > Hello,
>> > >> >
>> > >>
> Please let me know how to measure the slope of a MA. I can
> only
>> > > find
>> > >> > ways to measure slope
of linear regression line.
>> > >> >
>> >
>> > Thanks
>> > >> >
>> > >>
>
>> > >> >
>> > >> > Please note
that this group is for discussion between users
> only.
>> >
>> >
>> > >> > To get support from AmiBroker
please send an e-mail directly
> to
>> > >> >
SUPPORT {at} amibroker.com
>> > >> >
>> >
>> > For NEW RELEASE ANNOUNCEMENTS and other news always check
>
DEVLOG:
>> > >> > http://www.amibroker.com/devlog/
>> > >> >
>> > >> > For other
support material please check also:
>> > >> >
http://www.amibroker.com/support.html
>> > >> >
>> > >> > Yahoo! Groups
Links
>> > >> >
>> > >> >
>> > >> >
>> > >> >
>>
> >> >
>> > >> > --
>> > >>
> No virus found in this incoming message.
>> > >> >
Checked by AVG Free Edition.
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Virus Database: 269.10.8/904 - Release
> Date:
>> > >
7/16/2007 5:42 PM
>> > >> >
>> > >>
>
>> > >>
>> > >
>> > >
>> > >
>> > >
>> > > Please note
that this group is for discussion between users
> only.
>> >
>
>> > > To get support from AmiBroker please send an e-mail
directly to
>> > > SUPPORT {at} amibroker.com
>> >
>
>> > > For NEW RELEASE ANNOUNCEMENTS and other news always
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>> > >
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>>
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> >
>> >
>>
>
>
>
>
> Please note that this group is for discussion between users
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>
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