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Joris,
No problem with your code. I believe the error comes with the array indexing: array[100*i+10*j+k-111] - its not very robust.
I am currently re-writing slightly differently and will re-post. Thanks again for your input. Much appreciated.
Kevin
--- In amibroker@xxxxxxxxxxxxxxx, "Joris Schuller" <jschuller@xxx> wrote:
>
> Kevin,
>
> I understand that you had an error when displaying the afl. The afl I sent
> you works. Most of the time before I send out code, including this time I
> first send the email from Outlook to one of my online accounts (e.g. gmail,
> hotmail). From there I copy the code back into the AB editor and verify that
> it displays properly. This morning I repeated that process again and had no
> problems. Below a copy of the original afl. See whether it 2nd time around
> works.
>
>
>
> I looked a little bit more at your afl. I believe there are some errors. In
> a couple of days I will send you some changes/additions which will
> facilitate localizing the problem.
>
> //===============Verify that afl below works===============
>
> //=========================Begin Original Fibonacci Levels-Original
> =====================================
> Title = EncodeColor(4)+ _DEFAULT_NAME()+"; "+EncodeColor(1) +
> StrFormat("{{NAME}} - {{INTERVAL}}; {{DATE}}; O=%g, H=%g, L=%g, C=%g
> (%.1f%%)
> {{VALUES}}", O, H, L, C, SelectedValue( ROC( C, 1 ) ) );
> SetBarsRequired(sbrAll,sbrAll);
> //============== Begin Addition===================
> Plot(C,"C",1,64);
> ZigZagHL=ParamToggle("ZigZagHL","Off|On",1);
> NoOfLastPeaksTroughs=Param("NoOfLastPeaksTroughs",9,1,10,1);
> NoOfFibonacciLevels=Param("NoOfFibonacciLevels",9,1,10,1);
> Adjfactor=Param("Adjfactor",0.003,0,0.05,0.001); //Forex values;
> MinPlotValue=(1-Adjfactor)*LowestVisibleValue(L);
> MaxPlotValue=(1+Adjfactor)*HighestVisibleValue(H);
> Plot(MinPlotValue,"MinPlotValue",colorGreen,5);
> Plot(MaxPlotValue,"MaxPlotValue",4,5);
> //===============End Addition===========
> n = 0.3 ;//approx. 4 point swing on ES
> //fibs[1] = .62; fibs[2] = .27; fibs[3] = 0.01; fibs[4] = .38; fibs[5] =
> .5;//added ?????????? fibs[3] = 0.01??;fibs[1]=fibs [6] = .62????????
> fibs[2] = .27;???????
> //fibs [6] = .62; fibs[7] = 1; fibs[8] = 1.27; fibs[9] = 1.62; //9 symmetric
> levels//added????????(instead of:0,0.236,0.382,0.5,0.618,0.786.1,1.272)
> fibs[1] = 0.0; fibs[2] = .238; fibs[3] = .382; fibs[4] = .5;//added
> ?????????? fibs[3] = 0.01??;fibs[1]=fibs [6] = .62???????? fibs[2] =
> .27;???????
> fibs [5] = .618; fibs[6] = 0.786;fibs[7] = 1; fibs[8] = 1.272; fibs[9] =
> 1.618;//for(i=1;i<=9;i++) //Original
> for(i=1;i<=NoOfLastPeaksTroughs;i++)//Added
> {
> p[i] = LastValue(ValueWhen(PeakBars(H,n)==0,H,i)); //last 9 peaks
> t[i] = LastValue(ValueWhen(TroughBars(L,n)==0,L,i));//last 9 troughs
> //for(j=1;j<=9;j++) //Original
> for(j=1;j<=NoOfLastPeaksTroughs;j++) //added
> {
> //for(k=1;k<=9;k++)
> for(k=1;k<=NoOfFibonacciLevels;k++) //added assumed that this are the
> Fibonacct levels
> {
> array[100*i+10*j+k-111] = t[i] + fibs[k] * (p[j] - t[i]); // calc fib levels
> //added might have to adjust the constants(100,10,111) to reflect the param
> values
> }}}
> // Plot levels for testing purposes
> for(i=1;i<=900;i++) {
> //Plot(IIf(array[i]>0,array[i],-1e10),"a",colorBlue); //Original
> Plot(IIf(array[i]>MinPlotValue AND
> array[i]<MaxPlotValue,array[i],-1e10),"a",colorBlue);//Added
> }
> //==============ZigZagHL=========================added
> if (ZigZagHL)
> {
> //added
> Plot( C, "Close", 1,64);
> zigpct = Param( "ZigHL %",0.2,0.01,10,0.01);
> ATRmult = Param("ATRmult",1.8,0.1,3,0.1);
> Arrowadj = Param("Arrowadj; ",12,2,25,1);
> HHLLSel = ParamToggle("Each Pk/Tr|HH/LL","Each Pk/Tr|HH/LL",1);
> pk=PeakBars(H,zigpct)==0;
> tr=TroughBars(L,zigpct)==0;
> zHi=Zig(H,zigpct); zLo=Zig(L,zigpct); HLAvg=(zHi+zLo)/2;
> zp=IIf(pk,zHi,IIf(tr,zLo,IIf(HLAvg>Ref(HLAvg,-1),H,L)));
> zag=Zig(zp,zigpct);
> pR=Ref(zag,-1)<zag AND zag>Ref(zag,1);
> pS=Ref(zag,-1)>zag AND zag<Ref(zag,1);
> Plot(C,"C",1,64);
> Plot(zag,"",11,1|styleNoLabel);//Zig H-L
> PlotShapes(shapeDownArrow*pR,colorGreen,0,H,-Arrowadj);
> PlotShapes(shapeUpArrow*pS,colorRed,0,L,-Arrowadj);
> if(HHLLSel)
> {
> HH=((zag>Ref(zag,- 1) AND zag > Ref(zag,1)) AND (Peak(zag,zigpct,1
> )>Peak(zag,zigpct,2 ))); //HH
> LL=((zag<Ref(zag,- 1) AND zag < Ref(zag,1)) AND (Trough(zag,zigpct,1 )
> <Trough(zag,zigpct,2 ))); //LL
> }
> if(!HHLLSel)
> {
> HH=((zag>Ref(zag,- 1) AND zag > Ref(zag,1)));
> LL=((zag<Ref(zag,- 1) AND zag < Ref(zag,1)));
> }
> dist = ATRmult*ATR (20);//might not want that
> for( i = 0; i < BarCount; i++ )
> {
> // ONLY THIS should be inside the loop
> if( HH [i]) PlotText( "HH"+ "\n"+H[ i ], i, H[ i ]+dist[i], colorGreen );
> if( LL [i] ) PlotText( ""+L[ i ]+"\nLL", i, L[ i ]-dist[i], colorRed );
> }
> }
> //=========================End Original Fibonacci Levels-Original
> =====================================
>
>
>
> From: amibroker@xxxxxxxxxxxxxxx [mailto:amibroker@xxxxxxxxxxxxxxx] On Behalf
> Of kevinoversby
> Sent: Monday, December 21, 2009 3:35 PM
> To: amibroker@xxxxxxxxxxxxxxx
> Subject: [amibroker] Re: Writing a fib cluster indicator
>
>
>
>
>
> Hi Joris,
>
> Thanks very much for your comments, I will work on it further tonight.
> Regarding the levels, the first three were intended to be the extensions
> -.62, -.27 & 0 but there was a problem at the time with negative values (now
> solved). I agree .786 & .236 were missing.
>
> The idea behind adjusting the array indexing by 111 was to start at zero
> (when i=j=k=1, array index = 111 - 111) but this is not necessary, or could
> be fixed by starting i,j & k at zero.
>
> Kevin
>
> --- In amibroker@xxxxxxxxxxxxxxx <mailto:amibroker%40yahoogroups.com> ,
> "Joris Schuller" <jschuller@> wrote:
> >
> > Don't know how experienced you are; with that in mind, I would first
> > simplify code verification somewhat:
> >
> > 1. limit the plot to the current meaningful visible section by using
> > MinPlotValue=(1-Adjfactor)*LowestVisibleValue(L) and
> > MaxPlotValue=(1+Adjfactor)*HighestVisibleValue(H);
> >
> > 2. start with and verify a simple case (1 pair of peaks and troughs) and
> > expand from that. Compare results with the results using the Fibonacci
> > toolbar
> >
> > 3. use params to be able to methodically build up in complexity
> >
> > 4. turn on/off the included ZigZagHL to verify that the correct
> > peaks/troughs are selected
> >
> > 5. verify that the (incorrect) Fib levels you selected are what you want
> >
> > 6. convert the constants in the Fib level loop (10,100,111) to params
> > (currently incorrect Fib values are displayed).
> >
> > 7. changes are prefaced by "added"
> >
> >
> >
> > The proposed changes are shown below.
> >
> >
> >
> > Title = EncodeColor(4)+ _DEFAULT_NAME()+"; "+EncodeColor(1) +
> > StrFormat("{{NAME}} - {{INTERVAL}}; {{DATE}}; O=%g, H=%g, L=%g, C=%g
> > (%.1f%%)
> > {{VALUES}}", O, H, L, C, SelectedValue( ROC( C, 1 ) ) );
> > SetBarsRequired(sbrAll,sbrAll);
> > //============== added; Begin First Addition===================
> > Plot(C,"C",1,64);
> > ZigZagHL=ParamToggle("ZigZagHL","Off|On",1);
> > NoOfLastPeaksTroughs=Param("NoOfLastPeaksTroughs",9,1,10,1);
> > NoOfFibonacciLevels=Param("NoOfFibonacciLevels",9,1,10,1);
> > Adjfactor=Param("Adjfactor",0.003,0,0.05,0.001); //added. Forex values;
> for
> > stocks use change as necessary
> > MinPlotValue=(1-Adjfactor)*LowestVisibleValue(L);
> > MaxPlotValue=(1+Adjfactor)*HighestVisibleValue(H);
> > Plot(MinPlotValue,"MinPlotValue",colorGreen,5);
> > Plot(MaxPlotValue,"MaxPlotValue",4,5);
> > //===============End First Addition===========
> > n = 0.3 ;//approx. 4 point swing on ES
> > //fibs[1] = .62; fibs[2] = .27; fibs[3] = 0.01; fibs[4] = .38; fibs[5] =
> > .5;//added ?????????? fibs[3] = 0.01??;fibs[1]=fibs [6] = .62????????
> > fibs[2] = .27;???????
> > //fibs [6] = .62; fibs[7] = 1; fibs[8] = 1.27; fibs[9] = 1.62; //9
> symmetric
> > levels//added????????(instead of:0,0.236,0.382,0.5,0.618,0.786.1,1.272)
> > fibs[1] = 0.0; fibs[2] = .238; fibs[3] = .382; fibs[4] = .5;//added
> > ?????????? fibs[3] = 0.01??;fibs[1]=fibs [6] = .62???????? fibs[2] =
> > .27;???????
> > fibs [5] = .618; fibs[6] = 0.786;fibs[7] = 1; fibs[8] = 1.272; fibs[9] =
> > 1.618;//for(i=1;i<=9;i++) //Original
> > for(i=1;i<=NoOfLastPeaksTroughs;i++)//Added
> > {
> > p[i] = LastValue(ValueWhen(PeakBars(H,n)==0,H,i)); //last 9 peaks
> > t[i] = LastValue(ValueWhen(TroughBars(L,n)==0,L,i));//last 9 troughs
> >
> > //for(j=1;j<=9;j++) //Original
> > for(j=1;j<=NoOfLastPeaksTroughs;j++) //added
> > {
> > //for(k=1;k<=9;k++)
> > for(k=1;k<=NoOfFibonacciLevels;k++) //added; assumed that this are the
> > Fibonacci levels
> > {
> > array[100*i+10*j+k-111] = t[i] + fibs[k] * (p[j] - t[i]); // calc fib
> levels
> > //added; might have to adjust the constants(100,10,111) to reflect the
> > param values
> > }}}
> > // Plot levels for testing purposes
> > for(i=1;i<=900;i++) {
> > //Plot(IIf(array[i]>0,array[i],-1e10),"a",colorBlue); //Original
> > Plot(IIf(array[i]>MinPlotValue AND
> > array[i]<MaxPlotValue,array[i],-1e10),"a",colorBlue);//Added
> > }
> >
> > //==============ZigZagHL; added for verification
> > purposes=========================
> > if (ZigZagHL)
> > {
> > //added
> > Plot( C, "Close", 1,64);
> > zigpct = Param( "Zag %",0.2,0.01,10,0.01);
> > ATRmult = Param("ATRmult",1.8,0.1,3,0.1);
> > Arrowadj = Param("Arrowadj; ",12,2,25,1);
> > HHLLSel = ParamToggle("Each Pk/Tr|HH/LL","Each Pk/Tr|HH/LL",1);
> > pk=PeakBars(H,zigpct)==0;
> > tr=TroughBars(L,zigpct)==0;
> > zHi=Zig(H,zigpct); zLo=Zig(L,zigpct); HLAvg=(zHi+zLo)/2;
> > zp=IIf(pk,zHi,IIf(tr,zLo,IIf(HLAvg>Ref(HLAvg,-1),H,L)));
> > zag=Zig(zp,zigpct);
> > pR=Ref(zag,-1)<zag AND zag>Ref(zag,1);
> > pS=Ref(zag,-1)>zag AND zag<Ref(zag,1);
> > Plot(C,"C",1,64);
> > Plot(zag,"",11,1|styleNoLabel);//Zig H-L
> > PlotShapes(shapeDownArrow*pR,colorGreen,0,H,-Arrowadj);
> > PlotShapes(shapeUpArrow*pS,colorRed,0,L,-Arrowadj);
> > if(HHLLSel)
> > {
> > HH=((zag>Ref(zag,- 1) AND zag > Ref(zag,1)) AND (Peak(zag,zigpct,1
> > )>Peak(zag,zigpct,2 ))); //HH
> > LL=((zag<Ref(zag,- 1) AND zag < Ref(zag,1)) AND (Trough(zag,zigpct,1 )
> > <Trough(zag,zigpct,2 ))); //LL
> > }
> > if(!HHLLSel)
> > {
> > HH=((zag>Ref(zag,- 1) AND zag > Ref(zag,1)));
> > LL=((zag<Ref(zag,- 1) AND zag < Ref(zag,1)));
> > }
> > dist = ATRmult*ATR (20);//might not want that
> > for( i = 0; i < BarCount; i++ )
> > {
> > // ONLY THIS should be inside the loop
> > if( HH [i]) PlotText( "HH"+ "\n"+H[ i ], i, H[ i ]+dist[i], colorGreen );
> > if( LL [i] ) PlotText( ""+L[ i ]+"\nLL", i, L[ i ]-dist[i], colorRed );
> > }
> > }
> >
> >
> >
> > From: amibroker@xxxxxxxxxxxxxxx <mailto:amibroker%40yahoogroups.com>
> [mailto:amibroker@xxxxxxxxxxxxxxx <mailto:amibroker%40yahoogroups.com> ] On
> Behalf
> > Of kevinoversby
> > Sent: Saturday, December 19, 2009 4:32 PM
> > To: amibroker@xxxxxxxxxxxxxxx <mailto:amibroker%40yahoogroups.com>
> > Subject: [amibroker] Re: Writing a fib cluster indicator
> >
> >
> >
> >
> >
> >
> >
> >
> http://groups.yahoo.com/group/amibroker/photos/album/1601688415/pic/10192004
> > 79/view
> >
> > See link for plot of unfiltered levels. Levels will be filtered by
> proximity
> > and could also be weighted, for example, by size of swing producing them.
> >
> > Constructive comments welcome and appreciated.
> >
> > --- In amibroker@xxxxxxxxxxxxxxx <mailto:amibroker%40yahoogroups.com>
> <mailto:amibroker%40yahoogroups.com> ,
> > "kevinoversby" <kevinoversby@> wrote:
> > >
> > >
> > >
> > > OK, its running stably now, execution time well under 0.5 s. Next steps
> > are to sort the levels and detect clusters for plotting.
> > >
> > > If I try to set any of the fibs values to negative values they are
> > returned as {EMPTY} - why is that?
> > >
> > > Thanks / Kevin
> > >
> > > SetBarsRequired(sbrAll,sbrAll);
> > >
> > > n = 0.3 ;//approx. 4 point swing on ES
> > > fibs[1] = .62; fibs[2] = .27; fibs[3] = 0.01; fibs[4] = .38; fibs[5] =
> .5;
> > > fibs [6] = .62; fibs[7] = 1; fibs[8] = 1.27; fibs[9] = 1.62; //9
> symmetric
> > levels
> > >
> > > for(i=1;i<=9;i++)
> > > {
> > >
> > > p[i] = LastValue(ValueWhen(PeakBars(H,n)==0,H,i)); //last 9 peaks
> > > t[i] = LastValue(ValueWhen(TroughBars(L,n)==0,L,i));//last 9 troughs
> > >
> > > for(j=1;j<=9;j++)
> > > {
> > > for(k=1;k<=9;k++)
> > > {
> > >
> > > array[100*i+10*j+k-111] = t[i] + fibs[k] * (p[j] - t[i]); // calc fib
> > levels
> > > }}}
> > >
> > > // Plot levels for testing purposes
> > >
> > > for(i=1;i<=900;i++) {
> > > Plot(IIf(array[i]>0,array[i],-1e10),"a",colorBlue);
> > > }
> > >
> > >
> > >
> > > --- In amibroker@xxxxxxxxxxxxxxx <mailto:amibroker%40yahoogroups.com>
> <mailto:amibroker%40yahoogroups.com> ,
> > "kevinoversby" <kevinoversby@> wrote:
> > > >
> > > >
> > > >
> > > >
> > > >
> > > >
> > > > I've now got the levels plotting on ES 15 second data and its actually
> > quite fast as the array function calls are in a small loop. The strange
> part
> > is that the array reverts to empty shortly after plotting. Can anyone see
> > why?
> > > >
> > > > Thanks / Kevin
> > > >
> > > >
> > > > n = 0.3 ; //approx. 4 point swing on ES
> > > > fibs[1] = -.62; fibs[2] = -.27; fibs[3] = 0; fibs[4] = .38; fibs[5] =
> > .5;
> > > > fibs [6] = .62; fibs[7] = 1; fibs[8] = 1.27; fibs[9] = 1.62; //9
> > symmetric levels
> > > >
> > > > PeakCondition=PeakBars(H,n)==0;
> > > > TroughCondition=TroughBars(L,n)==0;
> > > >
> > > > for(i=1;i<=10;i++)
> > > > {
> > > >
> > > > p[i]=LastValue(ValueWhen(PeakCondition,H,i));
> > > > t[i] = LastValue(ValueWhen(TroughCondition,L,i));
> > > >
> > > > for(j=1;j<=10;j++)
> > > > {
> > > > for(k=1;k<=5;k++)
> > > > {
> > > >
> > > > array[i+j+k-2] = t[i] + fibs[k] * (p[j] - t[i]); // calc fib levels
> > > > }}}
> > > >
> > > > // Plot first 100 unfiltered levels for test purposes
> > > >
> > > > for(i=1;i<=100;i++) {
> > > > Plot(IIf(array[i]>0,array[i],-1e10),"a",colorBlue);
> > > > }
> > > >
> > > > --- In amibroker@xxxxxxxxxxxxxxx <mailto:amibroker%40yahoogroups.com>
> <mailto:amibroker%40yahoogroups.com> ,
> > "kevinoversby" <kevinoversby@> wrote:
> > > > >
> > > > > Hi Mike,
> > > > >
> > > > > Thank you very much for taking the time to post these tips. I will
> > incorporate as much as I can and post the update later.
> > > > >
> > > > >
> > > > > Kevin
> > > > >
> > > > > --- In amibroker@xxxxxxxxxxxxxxx
> <mailto:amibroker%40yahoogroups.com> <mailto:amibroker%40yahoogroups.com>
> > , "Mike" <sfclimbers@> wrote:
> > > > > >
> > > > > > Hi,
> > > > > >
> > > > > > A couple of quick points to spare you some wasted time.
> > > > > >
> > > > > > 1. In general; I think that you would benifet greatly by reading
> the
> > following:
> > > > > >
> > > > > > http://www.amibroker.com/guide/h_understandafl.html
> > > > > >
> > > > > > 2. You *really* do not want to be making array based function
> calls
> > (e.g. PeakBars, ValueWhen, IIF, TroughBars, etc) within a loop. This will
> be
> > horribly slow. Look for a way to calculate everything outside of a loop.
> > > > > >
> > > > > > 3. The termination check of all your for loops are incorrect. Do
> not
> > use "i = 10". You probably want something like "i <= 10". It needs to be a
> > boolean if you ever want it to terminate. Also "=" is assignment, "==" is
> > equivalence test.
> > > > > >
> > > > > > http://www.amibroker.com/guide/a_mistakes.html
> > > > > >
> > > > > > 4. When trying to populate an array inside a loop, you generally
> > should be populating bar by bar: e.g. array[i] = ...
> > > > > >
> > > > > > Mike
> > > > > >
> > > > > > --- In amibroker@xxxxxxxxxxxxxxx
> <mailto:amibroker%40yahoogroups.com>
> > <mailto:amibroker%40yahoogroups.com> , "kevinoversby" <kevinoversby@>
> wrote:
> > > > > > >
> > > > > > >
> > > > > > >
> > > > > > >
> > > > > > >
> > > > > > >
> > > > > > > Parts 1) & 2)
> > > > > > >
> > > > > > > n = 0.3 //approx. 4 point swing on ES
> > > > > > > fibs = [-.62 -.27 0 .38 .5 .62 1 1.27 1.62]; //symmetric
> > > > > > >
> > > > > > > for(i=1;i=10;i++)
> > > > > > > {
> > > > > > > PeakCondition=PeakBars(H,n)==0;
> > > > > > > p[i] = ValueWhen(PeakCondition,H,i);
> > > > > > > p[i] = IIf(p[i] >= HHV(p,i),p[i],0); //set to zero if not HH
> > > > > > >
> > > > > > > TroughCondition=TroughBars(L,n)==0;
> > > > > > > t[i] = ValueWhen(TroughCondition,L,i);
> > > > > > > t[i] = IIf(t[i] <= LLV(t,i),t[i],0); //set to zero if not LL
> > > > > > >
> > > > > > > for(j=1;j=10;j++)
> > > > > > > {
> > > > > > > for(k=1;k=9;k++)
> > > > > > > {
> > > > > > >
> > > > > > > array = t[i] + fibs[k] * (p[j] - t[i]); // calc fib levels
> > > > > > > }}}
> > > > > > >
> > > > > > > I'm unsure of the last line - how to assign the fib levels to an
> > array for sorting. Thanks in advance for any help.
> > > > > > >
> > > > > > >
> > > > > > > Kevin
> > > > > > >
> > > > > > >
> > > > > > >
> > > > > > >
> > > > > > > --- In amibroker@xxxxxxxxxxxxxxx
> <mailto:amibroker%40yahoogroups.com>
> > <mailto:amibroker%40yahoogroups.com> , "kevinoversby" <kevinoversby@>
> wrote:
> > > > > > > >
> > > > > > > > I have not found an AFL implementation of this so decided to
> > develop my own. I'm doing it here as there are a couple of coding issues
> I'm
> > unsure of. Constructive comments and tips most welcome.
> > > > > > > >
> > > > > > > > Process:
> > > > > > > >
> > > > > > > > 1) Find i last higher peaks and j last lower troughs
> > > > > > > > 2) For each peak/trough pair, calculate fib levels and add to
> > array
> > > > > > > > 3) Sort array
> > > > > > > > 4) Discard a level if distance to next level > tolerance
> > > > > > > > 5) Plot remaining levels, preferably at left or right edge
> like
> > volume at price (VAP) to simplify chart.
> > > > > > > >
> > > > > > > > (A thought just occurred that this would also be a useful
> > exercise with VAP levels - investigate later).
> > > > > > > >
> > > > > > > >
> > > > > > > > Kevin
> > > > > > > >
> > > > > > >
> > > > > >
> > > > >
> > > >
> > >
> >
>
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