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Chuck,
you donīt really need this line.It is not a mistake, it is just a
part of a previous code, not used in the following lines.
The collected MAprediction sequence is now at
http://groups.yahoo.com/group/amibroker/message/44790
Dimitris Tsokakis
--- In amibroker@xxxxxxxxxxxxxxx, "Chuck Rademacher"
<chuck_rademacher@x> wrote:
> DT,
>
> Is it possible that you have a mistake in the following AFL? In
> particular, does this line look correct:
>
> y=p*MA(C,p)-(p-1)*Ref(MA(C,p-1),-1);
>
> You assign "y", but never use it. That, by itself, doesn't mean
that there
> is an error. I have lots of code lingering around that I don't
need.
> But, I think that you do need the value of "y" later on. I'm
doing a lot
> of work in this area and would appreciate your comments.
> -----Original Message-----
> From: Dimitris Tsokakis [mailto:TSOKAKIS@x...]
> Sent: Wednesday, July 16, 2003 4:05 AM
> To: amibroker@xxxxxxxxxxxxxxx
> Subject: [amibroker] Fw: Predictions I
>
>
> The condition
> DescCrossPrediction=Cross(tClose,C);
> predicts that a Descending MA cross will occur tomorrow.
> It will be named
>
> Accurate0DescPredictions, if it is confirmed tomorrow
> Accurate1DescPredictions, if it is confirmed 1 day later
> Accurate2DescPredictions, if it is confirmed 2 days later
> UselessDescPredictions, if it is simultaneous with the prediction
> False, if it does not belong in one above category.
>
> [Last bar predictions are also considered as false, although the
majority
> will be confirmed tomorrow...]
> Similar terminology is used for the Ascending crosses.
> The N100 results from Jan2000 till now are enthusiastic and, in
practical
> terms, we may say that we can have a safe prediction
> for the [unknown] next bar MA cross.
> Explore your database for the n=1 last quotations with
>
> // MA cross Prediction Statistics, by Dimitris Tsokakis, July 2003
> p=20;MAp=MA(C,p);
> k=30;MAk=MA(C,k);
> y=p*MA(C,p)-(p-1)*Ref(MA(C,p-1),-1);
> tClose=(p*(k-1)*MA(C,k-1)-k*(p-1)*MA(C,p-1))/(k-p);
> DescCrossPrediction=Cross(tClose,C);
> AscCrossPrediction=Cross(C,tClose);
> ConfirmedDesc=Cross(MAk,MAp);
> ConfirmedAsc=Cross(MAp,MAk);
> DescTotalPredictions=Cum(DescCrossPrediction);
> Accurate0DescPredictions=Cum(ConfirmedDesc AND
> Ref(DescCrossPrediction,-1));
> Accurate1DescPredictions=Cum(ConfirmedDesc AND
> Ref(DescCrossPrediction,-2));
> Accurate2DescPredictions=Cum(ConfirmedDesc AND
> Ref(DescCrossPrediction,-3));
> UselessDescPredictions=Cum(ConfirmedDesc AND DescCrossPrediction);
> AscTotalPredictions=Cum(AscCrossPrediction);
> Accurate0AscPredictions=Cum(ConfirmedAsc AND Ref
(AscCrossPrediction,-1));
> Accurate1AscPredictions=Cum(ConfirmedAsc AND Ref
(AscCrossPrediction,-2));
> Accurate2AscPredictions=Cum(ConfirmedAsc AND Ref
(AscCrossPrediction,-3));
> UselessAscPredictions=Cum(ConfirmedAsc AND AscCrossPrediction);
> Filter=1;
> AddColumn(100*Accurate0DescPredictions/DescTotalPredictions,"Acc0
Desc
> %",1.0);
> AddColumn(100*Accurate1DescPredictions/DescTotalPredictions,"Acc1
Desc
> %",1.0);
> AddColumn(100*Accurate2DescPredictions/DescTotalPredictions,"Acc2
Desc
> %",1.0);
> AddColumn
(100*UselessDescPredictions/DescTotalPredictions,"Useless Desc
> %",1.0);
> AddColumn(100-Column0-Column1-Column2-Column3,"False Desc %",1.0);
> AddColumn(100*Accurate0AscPredictions/AscTotalPredictions,"Acc0
Asc
> %",1.0);
> AddColumn(100*Accurate1AscPredictions/AscTotalPredictions,"Acc1
Asc
> %",1.0);
> AddColumn(100*Accurate2AscPredictions/AscTotalPredictions,"Acc2
Asc
> %",1.0);
> AddColumn(100*UselessAscPredictions/AscTotalPredictions,"Useless
Asc
> %",1.0);
> AddColumn(100-Column5-Column6-Column7-Column8,"False Asc %",1.0);
>
>
> ----- Original Message -----
> From: Dimitris Tsokakis
> To: amibroker@xxxxxxxxxxxxxxx
> Sent: Tuesday, July 15, 2003 5:35 PM
> Subject: Predictions I
>
>
> We may calculate the next bar Close necessary for a MA(C,p) to
cross
> another MA(C,k).
> I will overcome this procedure and I will try just to predict if
a cross
> will occur tomorrow.
> For your AA window explore for the n=1 last quotations with
> // Prediction for a cross of two moving averages
> p=20;MAp=MA(C,p);Plot(MAp,"",1,8);
> k=30;MAk=MA(C,k);Plot(MAk,"",2,8);
> y=p*MA(C,p)-(p-1)*Ref(MA(C,p-1),-1);//Plot(Ref(C,0),"",7,8);
> tClose=(p*(k-1)*MA(C,k-1)-k*(p-1)*MA(C,p-1))/(k-p);
> DescCrossPrediction=Cross(tClose,C);
> AscCrossPrediction=Cross(C,tClose);
> ConfirmedDesc=Cross(MAk,MAp);
> ConfirmedAsc=Cross(MAp,MAk);
> Title=Name()+
> WriteIf(ConfirmedDesc,", Confirmed descending MAcross","")+
> WriteIf(DescCrossPrediction,", A descending MAcross will occur
> tomorrow","")
> +WriteIf(ConfirmedAsc,", Confirmed ascending MAcross","")+
> WriteIf(AscCrossPrediction,", An ascending MAcross will occur
> tomorrow","");
> Filter=1;
> AddColumn(Cum(DescCrossPrediction),"Predicted DescCrosses",1.0);
> AddColumn(Cum(ConfirmedDesc),"Confirmed DescCrosses",1.0);
> AddColumn(100*Cum(DescCrossPrediction)/Cum(ConfirmedDesc),"Desc
%");
> AddColumn(Cum(AscCrossPrediction),"Predicted AscCrosses",1.0);
> AddColumn(Cum(ConfirmedAsc),"Confirmed AscCrosses",1.0);
> AddColumn(100*Cum(AscCrossPrediction)/Cum(ConfirmedAsc),"Asc
%",1.0);
>
> to see the commulative predicted/actual cross relation.
> Replace the Filter=1; line with the
> Filter=AscCrossPrediction OR DescCrossPrediction;
> to see the predictions for tomorrow, or with the
> Filter=Ref(AscCrossPrediction OR DescCrossPrediction,-1);
> to see the confirmed crosses
> The commulative view for my favorites selection is in the
attached gif.
> A detailed analysis will follow.
> Use the same formula in Indicator Builder or Interpretation
window.
> Dimitris Tsokakis
> [to be continued]
>
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