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Perhaps the concept of degrees of slope for a
price vs time chart needs to be considered. The slope of the linear
regression line, as derived from LinRegSlope, is expressed in terms of
(change of price)/(change in time), or something like $/bar, $/day, etc.
(A degree measurement, however, would be dimensionless, for example as
determined by dividing one quantity, say some distance in meters, into
another distance, which is also in meters). Consequently, since
LinRegSlope is not really in radians, converting it to degrees doesn't really do
it, but just multiplies the $/bar result by a (dimensionless) number - ie.,
180/pi.
Question: Why try to convert to degrees?
Perhaps the $/bar slope is all that is needed? Or maybe a ($/bar)/(avg
price) to get a sort of % per bar change?
<BLOCKQUOTE
>
----- Original Message -----
<DIV
>From:
MarkF2
To: <A title=amibroker@xxxxxxxxxxxxxxx
href="">amibroker@xxxxxxxxxxxxxxx
Sent: Tuesday, June 17, 2003 12:20
PM
Subject: [amibroker] Re: Trendline with
Degree output
Anthony- really nice, but I think there's a bug
somewhere. ComparingQQQ with NDX, I got slopes of 4 and 72 degrees
respectively, eventhough both trendlines were 27 days and the slopes
looked the same.Mark--- In <A
href="">amibroker@xxxxxxxxxxxxxxx,
"Anthony Faragasso" <<A
href="">ajf1111@x...>wrote:> //Automatic
Support Trendline With Degrees> > //Anthony Faragasso,
2003> > x = Cum(1);> > per
=Param("Percent",2,0.01,3,0.01);// Sensitivity setting> >
s1=L;//Array> > EndValue1 = LastValue( Trough( s1, per, 1 )
);> > startvalue = LastValue( Trough( s1, per, 2 ) );>
> endbar = LastValue( ValueWhen( s1 == EndValue1, x, 1 ) );>
> startbar = LastValue( ValueWhen( s1 == startvalue, x, 1 ) );>
> aS = (EndValue1-startvalue)/(endbar-startbar);> > bS =
EndValue1;> > trendline = aS * ( x -endbar ) + bS;>
> //-----------------------------------//> >
// Conversion to
Degrees
//> > //-----------------------------------//> >
pi=4*atan(1);> > time=endbar-startbar;> >
myslope=LinRegSlope(trendline,time);> >
myradian=atan(myslope);> >
mydegree=myradian*(180/PI);//Degrees> >
//-------------------------------------//> >
Plot(C,"close",colorBlack,styleCandle);>
>Plot(IIf(x>startbar-5,trendline,-1e10),"Trendline",colorYellow,styleLine);>
> direction=WriteIf(mydegree >= 0 AND mydegree <=
0.99,"Flat> ",WriteIf(mydegree > 0 ,"Rising ",WriteIf(mydegree <
0 , "Falling ","")));> >
DirectionColor=LastValue(IIf(mydegree >0,colorBrightGreen,IIf(mydegree
< 0,> colorRed,IIf(mydegree >= 0 AND mydegree <= 0.99
,colorYellow,Null))));> >
Title=Name()+"..."+Date()+"\n"+"TRENDLINE is>
"+EncodeColor(directioncolor)+direction+EncodeColor(colorBlack)+"at"+"(
"+> WriteVal(mydegree,1)+" )"+" Degrees";> > >
> //plotting ( x, y ) grid> >
Plot(startbar==x,"",colorRed,styleHistogram|styleOwnScale);> >
Plot(ValueWhen(startbar==x,Low),"",colorRed,styleLine);> >
//-----------------------------------//> > // Automatic Anlaysis
window Output //> >
//-----------------------------------//> > // Settings :
//> > // n last quotations and n=1 //> > //
explore //> > //-----------------------------------//>
> Filter=mydegree > 0 OR mydegree <0;> >
AddColumn(mydegree,"Degree",1);> > > > >
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