baseline relative performance watchlist charts v2.afl

一个更精度的平滑涵数, 可用于股票交易系统.用于Amibroker 平台

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//
//  Formula Name:    Baseline Relative Performance Watchlist charts V2
//  Author/Uploader: Michael.S.G. 
//  E-mail:          [e-mail]
//  Date/Time Added: 2003-08-06 02:10:25
//  Origin:          
//  Keywords:        Baseline Relative Performance Watchlist charts
//  Level:           basic
//  Flags:           indicator
//  Formula URL:     http://www.amibroker.com/library/formula.php?id=294
//  Details URL:     http://www.amibroker.com/library/detail.php?id=294
//
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//
//  A Slightly more streamline version of the original.
//
//  This revision uses the currently selected ticker as the baseline. Watchlist
//  May be selected via CTRL-R Param Dialog.
//
//  This example plots lines for each entry in watchlist.
//
//  <OzFalcon>
//
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/* Baseline Relative Performance Watchlist charts
** Current Symbol used as a base line.
** (Use an Index as your Base eg XAO,XEJ,XMJ Etc...)
**
** This example plots lines for each entry in watchlist
** White = Base Line. (Usualy Selected Index)
** 
** Change the Watchlist with CTRL-R. Carefull of Big Watchlists.
**
** AFL implementation by Tomasz Janeczko
** Watchlist & Parameter's Addition by Michael.S.G. 
**
** Use Automatic scaling, Grid: Percent, Limits, Middle
*/
Listnum = Param( "Watchlist", 5, 0, 100, 1 );// Watchlist to display.

// the start point of comparision will be StartPoint bar
sp = Param( "Startpoint %", 55, 1, 100, 1 ); 
startpoint = int(BarCount*(sp/100));

// Here is a base line - We Use Currenty Selected Ticker.
// (Use an Index as your Base eg XAO,XEJ,XMJ Etc...) 
price = Close;
baseline = 100 * ( price/ValueWhen( Cum(1) == startpoint, price ) - 1 );

// base line chart (flat line)
Plot ( baseline - baseline,Name(),2,1);

list = GetCategorySymbols( categoryWatchlist, listnum );
for( i = 0; ( sym = StrExtract( list, i ) ) != ""; i++ )
 {
    price = Foreign( sym, "C" );
	 Plot (100 * ( price/ValueWhen( Cum(1) == startpoint, price ) - 1 )- baseline,sym,6+i,1);
 }

"StartPoint =" +WriteVal(startpoint);