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Hi Mubashar :
Thanks for ur info..for this code rather than certain percentage , some log value is used....
--- In amibroker@xxxxxxxxxxxxxxx, Mubashar Virk <mvirk67@xxx> wrote:
>
> Zigzag is forward looking.
>
> shahariar4 wrote:
> >
> >
> > Could any one here pls tell me if the following code is a forward
> > looking code? I have checked it with the Amibroker's code check tool
> > and there it says it does not refer future quotes but while using in
> > practical life it seems it references/uses future values....can any
> > one pls check and tell whats the things about it...
> >
> > _SECTION_BEGIN("Zig Zag Spike");
> > //----------------------------------------------------------
> > //
> > // Formula Name: Zig Zag
> > // Author/Uploader: Jeff
> > // E-mail: jparent@xxx <mailto:jparent%40nobid.com>
> > // Date/Time Added: 2005-06-14 22:15:57
> > // Origin:
> > // Keywords:
> > // Level: medium
> > // Flags: indicator
> > // Formula URL: http://www.amibroker.com/library/formula.php?id=472
> > <http://www.amibroker.com/library/formula.php?id=472>
> > // Details URL: http://www.amibroker.com/library/detail.php?id=472
> > <http://www.amibroker.com/library/detail.php?id=472>
> > //
> > //----------------------------------------------------------
> > //
> > // normal zig zag with following differences:
> > //
> > // - uses log difference instead of percentage
> > //
> > // - has trigger point indicating when highs and /lows were detected
> > //
> > // log difference is better because it is symmetrical, log(5/10) and
> > log(10/5)
> > // has same absolute value, whereas 5/10 and 10/5 have different values.
> > //
> > // trigger is when you can make a trade. usually a rookie mistake,
> > trades are
> > // shown to be made at the peaks and troughs of a move, especially in
> > // backtesting.
> > //
> > //----------------------------------------------------------
> >
> > // 'thold' is the threshold for the zig-zag turning points
> > // it is set to a minimum of 2.5% (approx, uses log difference
> > // which is more accurate) or a volatility measure
> > // based on 2 day range over the past 100 days
> >
> > min_thold=0.025;
> > thold=Max(min_thold,Median(ln(HHV(H,2)/LLV(L,2)),100));
> > thold=IIf(IsEmpty(thold),min_thold,thold);
> >
> > // 't' is a multiplier of 'thold'
> > // the larger the value of 't', the more significant the
> > // turning point. Adjust it by opening the Parameter window
> > // (press ctrl-R)
> >
> > t=Param("significance",2,2,6,1);
> >
> > // initialization of variables
> >
> > d=init=trig=HH=LL=z=0;
> >
> > // main body
> > // this program is different than the canned zigzag in that
> > // it is symmetrical, it does not use percentages, but rather
> > // log differences. close price is not used either. high and
> > // low trades are used. an additional item is the trigger
> > // indicator. it shows the point where the zig or zag was
> > // identified.
> >
> > for(i=1;i<BarCount;i++){
> > if (log(H[i]/L[init])>HH) HH=log(H[i]/L[init]);
> > if (log(L[i]/H[init])<LL) LL=log(L[i]/H[init]);
> > if (HH>(t*thold[init]) && d<=0)
> > { z[init]--; trig[i]=-0.5; d=1;init=i;HH=0;LL=0; }
> >
> > if (H[i]>H[init] && d==1){init=i;LL=0;}
> >
> > if (LL<(-t*thold[init]) && d>=0)
> > { z[init]++; trig[i]=0.5; d=-1;init=i;HH=0;LL=0; }
> >
> > if (L[i]<L[init] && d==-1){init=i;HH=0;}
> > }
> >
> > z_up=z>0; z_dn=z<0;
> >
> > Plot(z_up,"zig",colorGreen,1);
> > Plot(-z_dn,"zag",colorRed,1);
> > Plot(trig,"trigger",colorBlue,1);
> > _SECTION_END();
> >
> >
>
------------------------------------
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