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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
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> > >> > 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.
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> > >> > Version: 7.5.476 / 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 check
DEVLOG:
> > > http://www.amibroker.com/devlog/
> > >
> > > For other support material please check also:
> > > http://www.amibroker.com/support.html
> > >
> > > Yahoo! Groups Links
> > >
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> > >
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> 7/17/2007 6:30 PM
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> > >
> >
>
Please note that this group is for discussion between users only.
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For other support material please check also:
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