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Sorry May ask what is the Use of Centered MA
--- In equismetastock@xxxxxxxxxxxxxxx, "Jose Silva"
<josesilva22@xxxx> wrote:
> Ok, here's the final indicator version of the centered MA:
>
> ===========
> Centered MA
> ===========
> ---8<------------------------
>
> { Centered MA - v2.0 }
> { Uses forward-referencing to center MA }
>
> { ©Copyright 2005 Jose Silva
> For personal use only.
> http://www.metastocktools.com }
>
> { User inputs }
> pds:=Input("MA periods",1,2600,9);
> type:=Input("[1]EMA [2]SMA [3]TmSr [4]Tri [5]Var [6]Vol [7]
Wght",1,7,
> 1);
>
> { Choose MA type:
> 1 - Exponential MA
> 2 - Simple MA
> 3 - Time Series MA
> 4 - Triangular MA
> 5 - Variable MA
> 6 - Volume adjusted MA
> 7 - Weighted MA }
> ma:=
> If(type=1,Mov(C,pds,E),
> If(type=2,Mov(C,pds,S),
> If(type=3,Mov(C,pds,T),
> If(type=4,Mov(C,pds,TRI),
> If(type=5,Mov(C,pds,VAR),
> If(type=6,Mov(C,pds,VOL),
> Mov(C,pds,W)))))));
>
> { Forward-reference MA }
> center:=LastValue(Int(pds/2));
> fwd:=Ref(ma,center);
>
> { Extend plot into null zone }
> xtend:=LastValue(fwd+PREV-PREV);
>
> { Restrict invalid initial MA }
> ma:=Ref(Ref(xtend,pds-1),-pds+1);
>
> { Plot on price chart }
> ma
>
> ---8<------------------------
>
>
> jose '-)
> http://www.metastocktools.com
>
>
>
> --- In equismetastock@xxxxxxxxxxxxxxx, "Andrew Tomlinson"
> <andrew_tomlinson@xxxx> wrote:
> >
> > Thanks guys - I'd forgotten the LastValue(x+PREV-PREV)fix - I
think
> > the last time I saw it was in the Equis DCF formula (isn't
desktop
> > google wonderful...)
> >
> > Name: Distant Coefficient Ehlers Filter
> > Formula:
> > ti:= 15;
> > pr:= MP();
> > coef:=Sum(Power(Ref(LastValue(pr+PREV-PREV)-pr,-1),2),ti);
> > Sum(coef*pr,ti)/Sum(coef,ti)
> >
> > Not exactly system friendly, but it may solve the problem.
> > I'm working on it.
> >
> > Best
> > Andrew
> >
> > -----Original Message-----
> > From: equismetastock@xxxxxxxxxxxxxxx [mailto:
> > equismetastock@xxxxxxxxxxxxxxx]
> > On Behalf Of Jose Silva
> > Sent: Wednesday, May 25, 2005 2:27 PM
> > To: equismetastock@xxxxxxxxxxxxxxx
> > Subject: [EquisMetaStock Group] Re: Coding problem
> >
> >
> > Andrew, here's one way to get around the MetaStock null (or N/A)
> > limitation introduced by the forward-plotting Ref(x,+y) function:
> >
> >
> > ===========
> > Centered MA
> > ===========
> > ---8<--------------------
> >
> > { http://www.metastocktools.com }
> >
> > pds:=Input("MA periods",1,260,9);
> > type:=Input("MA type: [1]SMA, [2]EMA",1,2,1);
> >
> > sma:=If(type=1,Mov(C,pds,S),Mov(C,pds,E));
> > center:=LastValue(Int(pds/2));
> >
> > x:=Ref(sma,center);
> > y:=LastValue(x+PREV-PREV);
> >
> > If(y>0,y,C)
> >
> > ---8<--------------------
> >
> >
> > jose '-)
> > http://www.metastocktools.com
> >
> >
> >
> > --- In equismetastock@xxxxxxxxxxxxxxx, "Andrew Tomlinson"
> > <andrew_tomlinson@xxxx> wrote:
> > Hi guys,
> >
> > I am playing with a number of different ways of projecting a
> > centered moving average up to the current bar. For example, here
I
> > have a 9-day moving average which is centered and therefore
plots 5
> > days prior (i.e. the value for a particular bar is the SMA that
> > would normally plot 5 bars later). In> this case I am trying to
> > continue the line plot using the result of successively shorter
> > centered moving averages.
> >
> > The problem is that the following just plots the original
centered
> > moving average (CMA). If I replace the CMA1, CMA2...etc. in the
CMAP
> > code with numbers, they all plot, so the basic mechanism seems
ok.
> > I suspect I'm making some kind of elementary mistake - can anyone
> > see what I'm missing?
> >
> > (I know there are forward references - try coding a centered MA
> > without)
> >
> > P1:=Input("Odd # of bars:",1,1001,9);
> > MA:=Mov(C,P1,S);
> > CMA:=Ref(MA,(p1+1)/2);
> > CMA1:=Ref(Mov(C,P1-1,S),(p1+1)/2-1);
> > CMA2:=Ref(Mov(C,P1-2,S),(p1+1)/2-2);
> > CMA3:=Ref(Mov(C,P1-3,S),(p1+1)/2-3);
> > CMA4:=Ref(Mov(C,P1-4,S),(p1+1)/2-4);
> > CMA5:=Ref(Mov(C,P1-5,S),(p1+1)/2-5);
> >
> > CMAP:=
> > If(Cum(1)=LastValue(Cum(1)-(p1+1)/2+1),CMA1,
> > If(Cum(1)=LastValue(Cum(1)-(p1+1)/2+2),CMA2,
> > If(Cum(1)=LastValue(Cum(1)-(p1+1)/2+3),CMA3,
> > If(Cum(1)=LastValue(Cum(1)-(p1+1)/2+4),CMA4,
> > If(Cum(1)=LastValue(Cum(1)-(p1+1)/2+5),CMA5,CMA)))));CMAP;
> >
> > Best
> > Andrew
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