|
PureBytes Links
Trading Reference Links
|
For a loopless calculation you should take more care for some details:
Go first to Symbol->Categories and define your base index.
Then you should use fixup=0 to avoid filling the existing holes.
The population for my WL17 comes from the
function Population( listnum )
{
list = GetCategorySymbols( categoryWatchlist, listnum );
p = 0;
for( i = 0; ( sym = StrExtract( list, i ) ) != ""; i++ )
{
f = IsTrue(Foreign( sym, "C",0 ));
if( i == 0 ) p = f;
else p = p + f;
}
return p;
}
Plot(population(17),"",1,1);
I hope it will help.
Dimitris Tsokakis
--- In amibroker@xxxxxxxxxxxxxxx, "DIMITRIS TSOKAKIS" <TSOKAKIS@xxxx>
wrote:
> There is a simple and safe way to count the population of your
> database.
> Run for all quotations the
> addtocomposite(1,"~count","v");
> buy=0;
> Now, the
> pop=foreign("~count","v");
> will give you the population vs time.
> Dimitris Tsokakis
> --- In amibroker@xxxxxxxxxxxxxxx, "acesheet" <acesheet@xxxx> wrote:
> > I've been using AddToComposite to create various reference
indices
> > and industry indices lately and I'm wondering what this statement
> > from the AB help file really means?
> >
> > atcFlagResetValues = 1 - reset values at the beginning of scan
> > (recommended)
> >
> > I occassionaly get corrupted values of zero in the middle of the
> > price arrays even though I try to correct for this. Usually it
goes
> > away if I completely delete the data in my composite index and
> rerun
> > the composite calculation routine. I would really like to not
have
> > to do this as its a manual process. I;d like it to be completely
> > automatic.
> >
> > -ace
> >
> > Here's my code. Maybe I'm doing something wrong. Feel free to use
> > it. It seems to work quite well.
> >
> > //-------------------------------------------------------------
> > // INDUSTRY COMPOSITE CALCULATOR
> > //-------------------------------------------------------------
> > // AFL Script Version date 12/7/03
> > //-------------------------------------------------------------
> > // NOTES: Prior to running place your settings to this arrangement
> > // 1. Set the 'Apply to' filter to a watchlist containing
> one
> > // stock from each industry group and click 'use filter'
> > // 2. Set the 'Range' to 'n last quotations' where n=1
> > // 3. Run a 'Scan'
> > //-------------------------------------------------------------
> > function CreateIndustryAverage( listnum, price )
> > {
> > // retrieve comma-separated list of symbols in watch list
> > list = GetCategorySymbols( categoryIndustry, listnum );
> > Average = 0; // just in case there are no watch list members
> > m=0;
> > for( i = 0; ( sym = StrExtract( list, i ) ) != ""; i++ )
> > {
> > Val = Nz(Foreign( sym, "Close" ));
> > n=Nz(IIf(Val!=0,1,0));
> > m=m+n;
> > f = Nz(Foreign( sym, price ));
> > if( i == 0 ) Average = Average;
> > else Average = Average + f;
> > }
> > // 'm' is the running total of the number of stocks in the
> > // group vs. time. This account for differing lengths of
> > // historical data by stock
> > return Average / m;
> > }
> > //-------------------------------------------------------------
> > // Create the industry averages and store the values in temporary
> > // price arrays
> > //-------------------------------------------------------------
> > indticker="~"+IndustryID(1);
> > IO=CreateIndustryAverage( IndustryID(0), "O" )*10;
> > IH=CreateIndustryAverage( IndustryID(0), "H" )*10;
> > IL=CreateIndustryAverage( IndustryID(0), "L" )*10;
> > IC=CreateIndustryAverage( IndustryID(0), "C" )*10;
> > IV=CreateIndustryAverage( IndustryID(0), "V" );
> > list = GetCategorySymbols( categoryIndustry, IndustryID(0) );
> > //-------------------------------------------------------------
> > // Get Running total for number of stocks in the group vs. time
> > //-------------------------------------------------------------
> > m=0;
> > for( i = 0; ( sym = StrExtract( list, i ) ) != ""; i++ )
> > {
> > Val = Nz(Foreign( sym, "Close" ));
> > n=Nz(IIf(Val!=0,1,0));
> > m=m+n;
> > }
> > sf=1;
> > //-------------------------------------------------------------
> > // Create scale factors to correct for step changes in the
> > // number of stocks in the group
> > //-------------------------------------------------------------
> > for( i = 1; i<LastValue(Cum(IIf(m!=0,1,0))); i++ )
> > {
> > if(m[i]>m[i-1]) sf[i]=sf[i-1]*IC[i-1]/IO[i];
> > else sf[i]=sf[i-1];
> > }
> > IO1=sf*IO;
> > IH1=sf*IH;
> > IL1=sf*IL;
> > IC1=sf*IC;
> > IO=IIf(IO1==0,Ref(IO1,-1),IO1);
> > IH=IIf(IH1==0,Ref(IH1,-1),IH1);
> > IL=IIf(IL1==0,Ref(IL1,-1),IL1);
> > IC=IIf(IC1==0,Ref(IC1,-1),IC1);
> > IV=IIf(IV==0,Ref(IV,-1),IV);
> > //-------------------------------------------------------------
> > // Now correct for any zero values
> > for( i = 1; i<BarCount; i++ )
> > {
> > if(IO[i]==0) IO[i]=IO[i-1];
> > if(IH[i]==0) IH[i]=IH[i-1];
> > if(IL[i]==0) IL[i]=IL[i-1];
> > if(IC[i]==0) IC[i]=IC[i-1];
> > if(IV[i]==0) IV[i]=IV[i-1];
> > }
> > AddToComposite(IO,indticker,"O", 3);
> > AddToComposite(IH,indticker,"H", 3);
> > AddToComposite(IL,indticker,"L", 3);
> > AddToComposite(IC,indticker,"C", 3);
> > AddToComposite(IV,indticker,"V", 3);
> >
> > Buy=0;
> > Sell=0;
------------------------ Yahoo! Groups Sponsor ---------------------~-->
Buy Ink Cartridges or Refill Kits for your HP, Epson, Canon or Lexmark
Printer at MyInks.com. Free s/h on orders $50 or more to the US & Canada.
http://www.c1tracking.com/l.asp?cid=5511
http://us.click.yahoo.com/mOAaAA/3exGAA/qnsNAA/GHeqlB/TM
---------------------------------------------------------------------~->
Send BUG REPORTS to bugs@xxxxxxxxxxxxx
Send SUGGESTIONS to suggest@xxxxxxxxxxxxx
-----------------------------------------
Post AmiQuote-related messages ONLY to: amiquote@xxxxxxxxxxxxxxx
(Web page: http://groups.yahoo.com/group/amiquote/messages/)
--------------------------------------------
Check group FAQ at: http://groups.yahoo.com/group/amibroker/files/groupfaq.html
Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
|