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Gary, funny thing is I was
just about to click on the reply button when your email came
through.
I wish I was really good at
AFL, but I still just do the simple methods. Too much complexity tends to
bamboozle me easily these days :)
I think it all comes down
to how you define a pivot point. I just tried it by one method. I don't believe
you could ever say that a certain bar is a pivot until the subsequent bars move
in the opposite direction. So by my understanding referencing future is
necessary when finding them. Sorry probably off the track with your
query.
It would be possible to
have, say a pivot high, but no corresponding following pivot low. An example
that comes to mind is you may get a high then a few consecutive inside
days before the price continues up. This would create a pivot high, but no
real pivot low, just a short congestion.
I have been doodling with
various scenarios for defining pivot points and have added one to my definition,
code below (I have also changed the title of the code to better reflect what it
is finding, or trying to find)
//PIVOT
POINTS
//Graham Kavanagh <SPAN
class=947310913-11102003>11 Oct
2003
//Find turning points
top = ( H==<FONT
color=#0000ff>HHV(H,<FONT
color=#ff00ff>3) AND <FONT
color=#ff0000>H>=Ref(<FONT
color=#ff0000>H,1) <FONT
color=#ff0000>AND H>=<FONT
color=#0000ff>Ref(H,<FONT
color=#ff00ff>2) )
OR ( H==<FONT
color=#0000ff>HHV(H,<FONT
color=#ff00ff>3) AND <FONT
color=#ff0000>H>=Ref(<FONT
color=#ff0000>H,1) <FONT
color=#ff0000>AND Ref(<FONT
color=#ff0000>O,1)><FONT
color=#0000ff>Ref(C,<FONT
color=#ff00ff>1) );
bot = ( L==<FONT
color=#0000ff>LLV(L,<FONT
color=#ff00ff>3) AND <FONT
color=#ff0000>L<Ref(<FONT
color=#ff0000>L,1) <FONT
color=#ff0000>AND L<<FONT
color=#0000ff>Ref(L,<FONT
color=#ff00ff>2) )
OR ( L==<FONT
color=#0000ff>LLV(L,<FONT
color=#ff00ff>3) AND <FONT
color=#ff0000>L<=Ref(<FONT
color=#ff0000>L,1) <FONT
color=#ff0000>AND Ref(<FONT
color=#ff0000>C,1)><FONT
color=#0000ff>Ref(O,<FONT
color=#ff00ff>1) );
//Calculate movement between turning points
topH = ValueWhen(top,<FONT
color=#ff0000>H);
botL = ValueWhen(bot,<FONT
color=#ff0000>L);
moveup = Ref(botL,-<FONT
color=#ff00ff>1)<botL;
movedown = Ref(topH,-<FONT
color=#ff00ff>1)>topH;
diffup = IIf( moveup, botL - <FONT
color=#0000ff>ValueWhen( moveup, topH ), <FONT
color=#ff0000>Null);
diffdown = IIf( movedown, topH- <FONT
color=#0000ff>ValueWhen( movedown, botL ), <FONT
color=#ff0000>Null);
//Indicator section
GraphXSpace=5;<FONT
color=#0000ff>
Plot( C, <FONT
color=#8b0000>"C", colorLightGrey,
styleBar+<FONT
color=#ff0000>styleNoLabel );
PlotShapes( (<FONT
color=#ff0000>shapeHollowSmallCircle+<FONT
color=#ff0000>shapePositionAbove)*top, <FONT
color=#ff0000>colorRed, 0, <FONT
color=#ff0000>H );
PlotShapes( (<FONT
color=#ff0000>shapeHollowSmallCircle)*bot, <FONT
color=#ff0000>colorBlue , 0,
L);
Title = Name()+<FONT
color=#8b0000>" "+Date()+ <FONT
color=#8b0000>" Volatility, Red dots = peaks, blue = troughs" +
", down move = "
+ diffup + ", up move = " + diffdown +
", High = " + <FONT
color=#ff0000>H + ", Low = " +
L;
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: Saturday, 11
October 2003 1:39 AMTo:
amibroker@xxxxxxxxxxxxxxxSubject: RE: [amibroker] Simplified
support resistance levels
Graham,
Just thinking about the looking into the future issue. How could it
be possible to break the pivot high level while still forming and the pivot
high condition still be true. It does not seem to be possible.
Any thoughts? Just want to put this to bed.
Regards,
GaryGraham <gkavanagh@xxxxxxxxxxxxx>
wrote:
<BLOCKQUOTE class=replbq
>Thanks
for that Gary, gives me something to try to work them out, andwhether I
need them.Further to this simple support/resistance formula I am
looking at it to workout what the retracements are during trends. I am
just starting putting thistogether and look for any input to help
simplify or enhance. I see this asbeing used to determine box sizes for
P&F charts, swing points and settingtrailing stop levels to name a
few.Here is what I have so far//RETRACEMENTS TO FIND
VOLATILITY//Graham Kavanagh 10 Oct 2003//Find turning
pointstop = H==HHV(H,3) AND H>=Ref(H,1) AND H>=Ref(H,2);bot =
L==LLV(L,3) AND L<=Ref(L,1) AND L<=Ref(L,2);//Calculate
movement between turning pointstopH = ValueWhen(top,H);botL =
ValueWhen(bot,L);moveup = Ref(botL,-1)<botL;movedown =
Ref(topH,-1)>topH;diffup = IIf( moveup, botL - ValueWhen( moveup,
topH ), Null);diffdown = IIf( movedown, topH- ValueWhen( movedown, botL
), Null);//Indicator sectionGraphXSpace=5;Plot( C, "C",
colorLightGrey, styleBar+styleNoLabel );PlotShapes(
(shapeHollowSmallCircle+shapePositionAbove)*top, colorRed, 0,
H);PlotShapes( (shapeHollowSmallCircle)*bot, colorBlue , 0,
L);Plot(diffup, "diffup", colorAqua,
styleHistogram+styleLeftAxisScale);Plot(diffdown, "diffdown", colorLime,
styleHistogram+styleLeftAxisScale);Plot(0, "0", colorBlack,
styleLine+styleLeftAxisScale);Title = Name()+" "+Date()+ " Volatility,
Red dots = peaks, blue = troughs" +", down move = " + diffup + ", up
move = " + diffdown + ", High = " + H + ",Low = " +
L;Cheers,Graham<A
href="">http://groups.msn.com/ASXShareTrading<A
href="">http://groups.msn.com/FMSAustralia-----Original
Message-----From: Gary A. Serkhoshian [mailto:serkhoshian777@xxxxxxxxx]
Sent: Friday, 10 October 2003 12:41 PMTo:
amibroker@xxxxxxxxxxxxxxxSubject: RE: [amibroker] Simplified support
resistance levelsHi Graham,I forgot to include the PivotLow
function on the last send. Both are below.You'd use the functions
like this:#pragma nocache#include "Wherever you put your afl file
with the functions"PH = PivotHigh(3,3); PL = PivotLow(3,3);Plot( C,
"C", colorLightGrey, styleBar+styleNoLabel );Plot( PH, "res", colorRed,
styleDots+styleNoLine );Plot( PL, "sup", colorGreen,
styleDots+styleNoLine );Title = Name() + ", " + Date() + ", Support
& Resistance Levels Support = "+ PH + ", Resistance = " + PL
;If you are using functions embedded in your afl, make sure they are
abovethe code that actually calls them.e.g. Function
Blah(Len);{return MoreBlah;}BL =
Blah(5);Plot(BL,"BL",colordefault,styleline);Hope this
helps,GaryCODE BELOW FOR THE PIVOT LOW/HI FUNCTIONS//=====
PivotHigh(LeftStr, RightStr)
====================================/*SUPPORT & RESISTANCE
LEVELSGraham Kavanagh 9 Oct 2003Returns High value of
pivot*/function PivotHigh(LeftStr, RightStr){//Find turning
pointstop = H == HHV(H,LeftStr+1) AND H == Ref(HHV(H,RightStr+1),
RightStr);topH = ValueWhen(top,H);return topH;}//=======
PivotLow(LeftStr, RightStr)
====================================/*SUPPORT & RESISTANCE
LEVELSGraham Kavanagh 9 Oct 2003Returns Low value of
pivot*/function PivotLow(LeftStr, RightStr){//Find turning
pointsBOT = L == LLV(L,LeftStr+1) AND L == Ref(LLV(L,RightStr+1),
RightStr);BOTL = ValueWhen(BOT,L);return
BOTL;}Graham <gkavanagh@xxxxxxxxxxxxx>
wrote:Thanks Gary That makes it interesting as I have not yet tried
the function function :) Do you just put the numbers you want into the
intital function setting Eg function PivotHigh(2,
4)Cheers,Graham<A
href="">http://groups.msn.com/ASXShareTrading<A
href="">http://groups.msn.com/FMSAustralia-----Original
Message-----From: Gary A. Serkhoshian [mailto:serkhoshian777@xxxxxxxxx]
Sent: Friday, 10 October 2003 11:43 AMTo:
amibroker@xxxxxxxxxxxxxxxSubject: Re: [amibroker] Simplified support
resistance levelsHi Graham,I just added the ability to have
variable right and left strength andconverted into a function.
Hope this saves you some work, and thanks forall the posts and code
you've contributed.Regards,Gary//==========
PivotHigh(LeftStr, RightStr)
============================/*SUPPORT & RESISTANCE
LEVELSGraham Kavanagh 9 Oct 2003Returns High value of
pivot*/function PivotHigh(LeftStr, RightStr){//Find turning
pointstop = H == HHV(H,LeftStr+1) AND H == Ref(HHV(H,RightStr+1),
RightStr);topH = ValueWhen(top,H);return
topH;}Graham <gkavanagh@xxxxxxxxxxxxx> wrote: I
have been looking at various ways to chart the support resistance
elevels,ultimately to incorporate into various trading systems. Having
attemptedloops and other methods of differing complexity I pulled back
to thesimplest of forms, price.Now this is probably already shown
somewhere, but will share it anyway.Any comments
appreciated//SUPPORT & RESISTANCE LEVELS//Graham Kavanagh 9
Oct 2003//Find turning pointstop = H==HHV(H,3) AND
H>=Ref(H,1) AND H>=Ref(H,2);bot = L==LLV(L,3) AND L<=Ref(L,1)
AND L<=Ref(L,2);topH = ValueWhen(top,H);botL =
ValueWhen(bot,L);//Indicator sectionGraphXSpace=5;Plot( C,
"C", colorLightGrey, styleBar+styleNoLabel );Plot( topH, "res",
colorRed, styleDots+styleNoLine );Plot( botL, "sup", colorGreen,
styleDots+styleNoLine );Title = Name() + ", " + Date() + ", Support
& Resistance Levels Support = "+ topH + ", Resistance = " + botL
;Cheers,Graham<A
href="">http://groups.msn.com/ASXShareTrading<A
href="">http://groups.msn.com/FMSAustraliaSend
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