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In one respect, I shot my mouth off before fully understanding that
drawing lines using linregslope isn't the same as simply drawing lines
"freehand," whether it's with pencil and paper or with computer
graphics. Sincere apologies.:)
There's still the issue of how important the angle really is. Even if
using linregslope yields angles that are consistent without regard to
scaling, that's interesting from a trig standpoint but from a trading
standpoint, so what?
Luck,
Sebastian
---- In amibroker@xxxxxxxxxxxxxxx, "Fred" <ftonetti@xxx> wrote:
>
> Yes ...
>
> The angle is a relation of rise ( Price ) over run ( Time )
>
> When rise is measured in terms of percent or log10 of price there
> will be no change in the angle after a split ... Percentage or log10
> based moves in price are really the only reasonable way to measure
> them any way ... or chart them for that matter ... this is for the
> same reason that CAR is calculated the way it is i.e Total Gain ^ (
> 1 / Number of Years ) as opposed to something that typically gets
> referred to as ANN and has a formula like Total Gain / Number of
> Years ... The latter is at least imho a semi meaningless statistic.
>
> --- In amibroker@xxxxxxxxxxxxxxx, "quanttrader714"
> <quanttrader714@> wrote:
> >
> > Would you agree there's a problem if the slope changes when the
> stock
> > splits?
> >
> > --- In amibroker@xxxxxxxxxxxxxxx, "Joe Landry" <jelandry@> wrote:
> > >
> > > Don't apologize but you're not bursting my bubble, yet! ( but I'm
> > open to
> > > having it deflated).
> > > I've heard this knock off before and let's put it to bed if we
> can.
> > >
> > > Did you try zooming the chart? Both x and y? Surely the slope
> of the
> > > plotted line
> > > changes as you move both the x, abscissa and the ordinate, price,
> > but the
> > > calculated
> > > values of the slope from using linregslope does not. I think of
> the
> > slope
> > > as representative of the rate of change of
> > > that price (or other) array. I don't know what Eckhardt said or
> in
> > what
> > > context he said it. Maybe
> > > he was talking about using pencil and paper. There the scaling on
> > the chart
> > > would make a difference.
> > >
> > > Also, you have to ask yourself, why would Tomasz have coded a
> > linregslope
> > > function, or Dimitris Tsokakis and others
> > > used it so frequently in their work on the forum? In my
> collection
> > alone of
> > > valued AFL clips I get 200 hits by many different
> > > users of this board.
> > >
> > > Best regards
> > > JOE
> > >
> > >
> > > ----- Original Message -----
> > > From: "sebastiandanconia" <sebastiandanconia@>
> > > To: <amibroker@xxxxxxxxxxxxxxx>
> > > Sent: Thursday, August 24, 2006 9:31 AM
> > > Subject: [amibroker] Re: Never Took Trigonometry
> > >
> > >
> > > >I apologize for bursting your bubble, but angles are not going
> to be a
> > > > consistent measure. If the scale of the chart changes so does
> the
> > > > angle, even if the price data and timeframe are precisely the
> same.
> > > >
> > > > Trendlines that connect highs/lows, however, are consistent
> regardless
> > > > of scale. In "The New Market Wizards" mathmatician William
> Eckhardt
> > > > explains why methods based on angles are fallacious, but
> methods based
> > > > on trendlines are more legitimate.
> > > >
> > > >
> > > > Luck,
> > > >
> > > > Sebastian
> > > >
> > > > --- In amibroker@xxxxxxxxxxxxxxx, "Charles J. Dudek" <trader@>
> wrote:
> > > >>
> > > >> I don't know how to convert a slope value (LinRegSlope) to an
> angle.
> > > >> I took a line from the Woodie's CCI script and converted it,
> but I
> > > >> don't think it's right.
> > > >>
> > > >> PI = atan(1.00) * 4;
> > > >> angle = round(180 * acos(1/LinRegSlope(C,sp)) / PI);
> > > >>
> > > >> Chuck Dudek
> > > >>
> > > >
> > > >
> > > >
> > > >
> > > >
> > > >
> > > >
> > > > 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 other support material please check also:
> > > > http://www.amibroker.com/support.html
> > > >
> > > >
> > > > Yahoo! Groups Links
> > > >
> > > >
> > > >
> > > >
> > > >
> > > >
> > > >
> > >
> >
>
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