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This is how you can create an adaptive indicator
A:=P;
Periods:=Input("Time Periods",1,1000, 10);
Direction:=A - Ref(A,-periods);
Volatility:= Sum(Abs(ROC(A,1,$)),periods);
ER:= Abs(Direction/Volatility);
FastSC:=2/(2 + 1);
SlowSC:=2/(30 + 1);
SSC:=ER*(FastSC - SlowSC) + SlowSC;
Constant:=Pwr(SSC,2);
AMA:=If(Cum(1)=periods +1,Ref(A,-1) + constant * (A - Ref(A,-
1)),PREV + constant * (A - PREV));
AMA
--- In Metastockusers@xxxxxxxxxxxxxxx, "Robin Hood" <robinhood@xxxx>
wrote:
> Hi Henry,
>
> I want to make variable the input period of an indicator and do
this by using a mathematical expression which modifies the starting
input period (which is fixed).
>
> So, we may say that I want to make adaptive the indicator, yes :-)
>
> But it seems the indicator editor doesn't accept this.
>
> r.
>
>
> ----- Original Message -----
> From: Henry Z Kaczmarczyk
> To: Metastockusers@xxxxxxxxxxxxxxx
> Sent: Sunday, December 07, 2003 3:00 PM
> Subject: [Metastockusers] Re: Custom Indicator and variable input
>
>
> Rob,
> I have a few questions as to what you are trying to do?
>
> Do you want an adaptive indicator that adjusts to market
conditions?
> Or are you trying to create a variable?
>
> Henry
> --- In Metastockusers@xxxxxxxxxxxxxxx, "Robin Hood"
<robinhood@xxxx>
> wrote:
> > Sorry for the - I think - stupid question...
> >
> > I want to have two values to let evaluate to Metastock: n0
(the
> initial
> > time), and n1 (time evaluated today) in such a way that I'll
> obtain a
> > variable input for a personal function.
> >
> > __ For example: ______________________
> >
> > n0:= Input("n0",1,1000,20);
> > n1:=n0* (expression of my input function );
> >
> > (MyIndicator which uses n1 as input)
> >
> > ____________________________________
> >
> > Metastock says me "this variable and expression must contain
only
> constant
> > data" referred to n1.
> >
> > So, I'd like a variable input for my indicator (hehehe as
> everyone?) and I
> > don't know the right formulation of it.
> >
> > I suppose I could try with "if statements"?
> >
> >
> >
> > Thanks in advance
> >
> > rob.
>
>
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