|
PureBytes Links
Trading Reference Links
|
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@xxxxxxxxx
// 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
// Details URL: 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();
------------------------------------
**** IMPORTANT PLEASE READ ****
This group is for the discussion between users only.
This is *NOT* technical support channel.
TO GET TECHNICAL SUPPORT send an e-mail directly to
SUPPORT {at} amibroker.com
TO SUBMIT SUGGESTIONS please use FEEDBACK CENTER at
http://www.amibroker.com/feedback/
(submissions sent via other channels won't be considered)
For NEW RELEASE ANNOUNCEMENTS and other news always check DEVLOG:
http://www.amibroker.com/devlog/
Yahoo! Groups Links
<*> To visit your group on the web, go to:
http://groups.yahoo.com/group/amibroker/
<*> Your email settings:
Individual Email | Traditional
<*> To change settings online go to:
http://groups.yahoo.com/group/amibroker/join
(Yahoo! ID required)
<*> To change settings via email:
mailto:amibroker-digest@xxxxxxxxxxxxxxx
mailto:amibroker-fullfeatured@xxxxxxxxxxxxxxx
<*> To unsubscribe from this group, send an email to:
amibroker-unsubscribe@xxxxxxxxxxxxxxx
<*> Your use of Yahoo! Groups is subject to:
http://docs.yahoo.com/info/terms/
|