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Good idea, PJ.
Here is a centered Mov Avg version with future projection channels:
=============
MA - centered
=============
---8<--------------------------
{ Centered Moving Average v4.0 }
{ Uses forward-referencing to
center Mov Avg and project future direction.}
{ Uses hindsight - do not trade! }
{ ©Copyright 2005 Jose Silva
For personal use only.
http://www.metastocktools.com }
{ User inputs }
fwPds:=Input("Forward-referencing periods (automatic = -1)",-1,2600,-
1);
proj:=Input("Project last known MA: [1]Direction, [2]Value",1,2,1);
pds:=Input("Mov Avg periods",1,2600,21);
channel:=Input("Channel +/- boundary %",
0,1000,5)/100;
type:=Input("[1]EMA [2]SMA [3]TmSr [4]Tri [5]Var [6]Vol [7]Wght",1,7,
2);
{ Choose MovAvg 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)))))));
{ Automatic period-centering }
center:=LastValue(If(fwPds<0,Int(pds/2),fwPds));
{ Forward-referenced MovAvg }
fwd:=Ref(ma,center);
{ Last valid MovAvg plot point }
valid:=Cum(IsDefined(fwd))
=LastValue(Cum(IsDefined(fwd)));
valid:=valid AND Alert(valid=0,2);
{ Extend last MovAvg plot to future null zone }
xtend:=LastValue(fwd+PREV-PREV);
{ Restrict invalid initial MovAvg plot }
movAvg:=Ref(Ref(xtend,pds-1),-pds+1);
{ Last MA known direction & future projection }
init:=Cum(IsDefined(movAvg))=1;
direction:=movAvg+
If(IsUndefined(fwd),
ValueWhen(1,init OR valid,movAvg)-
ValueWhen(1,init OR valid,Ref(movAvg,-1)),0)
*BarsSince(init OR valid);
{ Choose Centered MovAvg type }
CMA:=If(proj=1,direction,movAvg);
{ Plot MovAvg on price chart }
If(BarsSince(valid),CMA,CMA)*(1+channel);
If(BarsSince(valid),CMA,CMA)*(1-channel);
CMA
---8<--------------------------
Jose '-)
http://www.metastocktools.com
--- In equismetastock@xxxxxxxxxxxxxxx, PJ Chai <promedac@xxxx> wrote:
> Thank you Jose, this is exactly what I am looking for.
> I have put in another 2 parallels to form a channel.
> Thank you once again for your big help.
> PJ Chai
>
> On 9/2/05, Jose Silva <josesilva22@xxxx> wrote:
>
> Here's a concept I thought about whilst on holidays:
>
> Forward reference (shift backwards on charts) and center a Moving
> Average, then extend and project the last known MA direction into
> the future.
>
> This method gets around the no-plot in null (N/A) zone limitation in
> MetaStock, and can apply to any indicator or oscillator on charts or
> separate windows.
>
>
> MetaStock -> Tools -> Indicator Builder -> New ->
> Copy and paste complete formula between "---8<---" lines.
>
> =============
> MA - centered
> =============
> ---8<--------------------------
>
> { Centered Moving Average - v3.0 }
> { Uses forward-referencing to center Mov Avg
> and project future direction.}
> { Uses hindsight - do not trade! }
>
> { (c)Copyright 2005 Jose Silva
> For personal use only.
> http://www.metastocktools.com }
>
> { User inputs }
> fwPds:=Input("Forward-referencing periods (automatic = -1)",-1,2600,
> -1);
> proj:=Input("Project last known MA: [1]Direction, [2]Value",1,2,1);
> pds:=Input("Mov Avg periods",1,2600,21);
> type:=Input("[1]EMA [2]SMA [3]TmSr [4]Tri [5]Var [6]Vol [7]Wght",1,
> 7,2);
>
> { Choose MovAvg 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)))))));
>
> { Automatic period-centering }
> center:=LastValue(If(fwPds<0,Int(pds/2),fwPds));
>
> { Forward-referenced MovAvg }
> fwd:=Ref(ma,center);
>
> { Last valid MovAvg plot point }
> lastVal:=IsUndefined(fwd)
> AND Alert(IsUndefined(fwd)=0,2);
>
> { Extend MovAvg plot into future null zone }
> xtend:=LastValue(fwd+PREV-PREV);
>
> { Restrict invalid initial MovAvg plot }
> movAvg:=Ref(Ref(xtend,pds-1),-pds+1);
>
> { Last MA known direction & future projection }
> init:=Cum(IsDefined(movAvg))=1;
> direction:=movAvg+
> ( ValueWhen(1,init OR lastVal,Ref(movAvg,-1))
> -ValueWhen(1,init OR lastVal,Ref(movAvg,-2)))
> *(BarsSince(init OR lastVal)+1);
>
> { Plot MovAvg on price chart }
> If(proj=1,direction,movAvg)
>
> ---8<--------------------------
>
>
> jose '-)
> http://www.metastocktools.com
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