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I think that because it
displaces to the right to look into the future it sees the values past the last
bar as being null. Because both sides of the = are null they are therefor equal
causing the pk to be true.
Cheers,Graham<A
href="">http://groups.msn.com/ASXShareTrading<A
href="">http://groups.msn.com/FMSAustralia
<FONT
face=Tahoma size=2>-----Original Message-----From: Gary A.
Serkhoshian [mailto:serkhoshian777@xxxxxxxxx] Sent: Sunday, 16
November 2003 7:18 AMTo:
amibroker@xxxxxxxxxxxxxxxSubject: LITTLE HELP PLEASE RE:
[amibroker] Slight problem with this script - I'm Stumped
Hi all,
Can anyone explain what is going on in the array below that would cause
it to = 1 for the last four bars on AMD where the Ref(L,-3) is the trough low
when n=3. The error only occurs when the tr or pk arrays = 1 and are
within n bars or so from the peak or trough, and I assume it has
something to do with looking in the future with the outer REF.
I just want to understand the error in coding so I don't make the same
mistake. The full code is at the bottom of the e-mail. Thanks,
Gary
<FONT
face="Courier New">pk=Ref(HHV(H,2*n+1)==Ref(H,-n),n);tr=Ref(LLV(L,2*n+1)==Ref(L,-n),n);
In Ace's code, what is going on in AB that causes the array
HHV(H,2*n+1)==Ref(H,-n) to = 1 when forecasted 3
bars in the future when those bars don't yet exist. In other words, why
the green colored bars on AMD with n=3 for the last 4 bars?
Your solution was a good one, but I just wanted to bring closure to what
was happening in Ace's original code related to the Ref looking n bars in
future of array above.
"Gary A. Serkhoshian" <serkhoshian777@xxxxxxxxx>
wrote:
<BLOCKQUOTE class=replbq
>
Graham,
In Ace's code, what is going on in AB that causes the array
HHV(H,2*n+1)==Ref(H,-n) to = 1 when forecasted
3 bars in the future when those bars don't yet exist. In other words,
why the green colored bars on AMD with n=3 for the last 4 bars?
Your solution was a good one, but I just wanted to bring closure to
what was happening in Ace's original code related to the Ref looking n bars
in future of array above.
Thanks,
Gary
Graham <gkavanagh@xxxxxxxxxxxxx>
wrote:
<BLOCKQUOTE class=replbq
>AceAdd
this to your plot and you will see why. These are your conditions for
the pk.
Plot(Ref(HHV(H,2*n+1),n),"",colorRed,styleLine);Plot(Ref(Ref(H,-n),n),"",colorBlue,styleLine);You
could also centre the sh and sl plots around the bars that for the pk
&tr bars. Plot( Ref(sh,2*n+1), "SH", colorPink, styleLine);
Plot( Ref(sl,2*n+1), "SL", colorLightBlue, styleLine); GraphXSpace=5;
Cheers,Graham<A
href="">http://groups.msn.com/ASXShareTrading<A
href="">http://groups.msn.com/FMSAustralia
-----Original Message-----From: acesheet
[mailto:acesheet@xxxxxxxxx] Sent: Saturday, 15 November 2003 12:25
PMTo: amibroker@xxxxxxxxxxxxxxxSubject: [amibroker] Slight problem
with this script - I'm StumpedHi all,I plan on using
this script to test breakout trading systems and it just about works
the way I want it to. But....What I'm trying to do is determine
swing highs and lows of "nth" degree. Which means that if I select a
n=2 degree Swing High/Low setup the swing high (SH), for instance,
must have two lower (or equal) highs both on the left and on the right
of it. So I don't know until two days after the SH occured that it
actually was an SH.In this script I've colored the bars green and
dark red. The greens represent the SL's and the dark red's the SH's. I
also plotted an envelope (pink and light blue) of the latest SH's and
SL's that are known at the time of each bar.My problem is that
for certain selections of 'n' and certain stocks several bars near the
last set of bars get colored when the script shouldn't even know if
they are SH's or SL's. To see what I mean try plotting AMD with
n=3.Can anyone tell me why these colors are occuring? Better yet,
can you offer a solution? Thanks.-ace//
--------------------------------------------------// ----------------
Start AFL Script ----------------//
--------------------------------------------------// Plotting Swing
Highs and Lows//
--------------------------------------------------// Degree of SH/SL
setn=3;// --------------------------------------------------//
Peak and Trough points (SH's and SL's)
pk=Ref(HHV(H,2*n+1)==Ref(H,-n),n);tr=Ref(LLV(L,2*n+1)==Ref(L,-n),n);//
--------------------------------------------------// SH and SL
envelope
valuessh1=IIf(pk,H,Null);sh=Ref(HighestSince(pk,sh1,1),-n-1);sl1=IIf(tr,L,Null);sl=Ref(HighestSince(tr,sl1,1),-n-1);//
--------------------------------------------------// PlottingPlot(
Close, "OHLC", IIf(pk,colorDarkRed,IIf
(tr,colorGreen,colorBlack)),132); Plot( sh, "SH", colorPink,
styleLine); Plot( sl, "SL", colorLightBlue,styleLine);
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