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Ed,
Add the bar number to your output and you'll see what the problem is.
Here's a sample using your code over a watchlist of mine:
Bar: 16 Sig: GPT Sig2: GPT
Bar: 17 Sig: PGL Sig2: PGL
Bar: 18 Sig: ABC Sig2: ABC
Bar: 18 Sig: ABC Sig2: CCL
Bar: 18 Sig: ABC Sig2: EQI
Bar: 19 Sig: APN Sig2: APN
Bar: 19 Sig: APN Sig2: CFX
Bar: 19 Sig: APN Sig2: QBE
Bar: 19 Sig: APN Sig2: SEV
Bar: 19 Sig: APN Sig2: TAH
Bar: 20 Sig: CTX Sig2: CTX
Bar: 20 Sig: CTX Sig2: GWT
Bar: 21 Sig: BEN Sig2: BEN
Bar: 21 Sig: BEN Sig2: GUD
Bar: 24 Sig: DJS Sig2: DJS
Bar: 24 Sig: DJS Sig2: SYB
Bar: 24 Sig: DJS Sig2: TCL
Bar: 25 Sig: COA Sig2: COA
Bar: 25 Sig: COA Sig2: FLT
Note that for any single bar number, there's only one Sig stock.
GP
--- In amibroker@xxxxxxxxxxxxxxx, "Edward Pottasch" <empottasch@xxx>
wrote:
>
> david,
>
> below a complete test system including this code. A snapshort of the
output in the AA window looks like this:
>
> Sig: AMZN Sig2: AMZN
> Sig: AMZN Sig2: ESLR
> Sig: AMZN Sig2: GNTX
> Sig: AMZN Sig2: GPRO
> Sig: AMZN Sig2: GROW
> Sig: IFIN Sig2: IFIN
> Sig: IFIN Sig2: OSIP
> Sig: IFIN Sig2: VARI
> Sig: AMCC Sig2: AMCC
> Sig: AMCC Sig2: SEPR
> Sig: CELG Sig2: CELG
> Sig: CORS Sig2: CORS
> Sig: CYMI Sig2: CYMI
> Sig: CYMI Sig2: DAKT
> Sig: CYMI Sig2: INTU
> Sig: CYMI Sig2: JNPR
> Sig: CYMI Sig2: SSRI
> Sig: AGIX Sig2: AGIX
> Sig: AGIX Sig2: AMAG
> Sig: AGIX Sig2: CHRS
> Sig: AGIX Sig2: COLM
> Sig: AGIX Sig2: DRIV
> Sig: AGIX Sig2: FLEX
> Sig: AGIX Sig2: FORM
> Sig: AGIX Sig2: LECO
> Sig: IDXX Sig2: IDXX
> Sig: IDXX Sig2: JBLU
> Sig: IDXX Sig2: XMSR
>
> etc.
>
>
> regards, ed
>
>
>
>
> SetOption("UseCustomBacktestProc", True );
>
> if( Status("action") == actionPortfolio ) {
>
> bo = GetBacktesterObject();
> bo.backtest();
>
> for(bar=0; bar<BarCount; bar++) {
>
> for ( sig = bo.GetFirstSignal(bar); sig;
sig=bo.GetNextSignal(bar)) {
>
> for ( sig2 = bo.GetFirstSignal(bar); sig2;
sig2=bo.GetNextSignal(bar)) {
>
> bo.RawTextOutput( "\t" + "Sig: " + sig.Symbol + "
Sig2: " + sig2.Symbol );
>
> }
>
> }
>
> }
>
> }
>
>
>
> SetOption("InitialEquity", 100000 );
> SetOption("MaxOpenPositions", 4 );
>
> PositionSize = -25;
> SetTradeDelays(0,0,0,0);
>
> Buy = Cross(RSI(14),30); Buy = Ref(Buy,-1); BuyPrice = O;
> Sell = Cross(70,RSI(14)); Sell = Ref(Sell,-1); SellPrice = O;
>
> Short = Sell; ShortPrice = O;
> Cover = Buy; CoverPrice = O;
>
> Buy = ExRem( Buy, Sell );
> Sell = ExRem( Sell, Buy );
> Short = ExRem( Short, Cover );
> Cover = ExRem( Cover, Short );
>
>
> SetChartOptions(0, chartShowDates);
> Plot(C,"C",1,64);
>
> PlotShapes(IIf(Buy,shapeUpArrow,0),colorWhite, layer = 0, yposition
= BuyPrice, offset = 0 );
> PlotShapes(IIf(Sell,shapeDownArrow,0),colorYellow, layer = 0,
yposition = SellPrice, offset = 0 );
> PlotShapes(IIf(Short,shapeHollowDownArrow,0),colorLightBlue, layer =
0, yposition = ShortPrice, offset = -15 );
> PlotShapes(IIf(Cover,shapeHollowUpArrow,0),colorGold, layer = 0,
yposition = CoverPrice, offset = -15 )
>
>
>
> ----- Original Message -----
> From: david.weilmuenster
> To: amibroker@xxxxxxxxxxxxxxx
> Sent: Monday, July 02, 2007 8:41 PM
> Subject: [amibroker] Re: Nested Loops - Custom Backtester
>
>
> Ed,
>
> Unfortunately, I cannot re-create your results here. I used a very
> simple backtest, and copied your code verbatim, but the outer loop
> still executes only for the first signal.
>
> Thanks, though, for the suggestion,
>
> David
>
> --- In amibroker@xxxxxxxxxxxxxxx, "Edward Pottasch" <empottasch@>
> wrote:
> >
> > hi,
> >
> > it seems to be possible. I ran this code on top of some backtest.
> The results in the AA window show that both loops are used. If you
> want to change a trade then you will have to change this setup. Here
> I first run the backtest and then go through the signal object.
> >
> > Ed
> >
> >
> >
> >
> > SetOption("UseCustomBacktestProc", True );
> >
> > if( Status("action") == actionPortfolio ) {
> >
> > bo = GetBacktesterObject();
> > //bo.PreProcess(); // Initialize backtester
> > bo.backtest();
> >
> > for(bar=0; bar<BarCount; bar++) {
> >
> >
> > for ( sig = bo.GetFirstSignal(bar); sig;
> sig=bo.GetNextSignal(bar)) {
> >
> >
> > for ( sig2 = bo.GetFirstSignal(bar); sig2;
> sig2=bo.GetNextSignal(bar)) {
> >
> > bo.RawTextOutput( "\t" + "Sig: " + sig.Symbol
> + " Sig2: " + sig2.Symbol );
> >
> >
> > }
> >
> > }
> >
> > }
> > //bo.PostProcess(); // Finalize backtester
> >
> > }
> >
> >
> >
> >
> > ----- Original Message -----
> > From: david.weilmuenster
> > To: amibroker@xxxxxxxxxxxxxxx
> > Sent: Monday, July 02, 2007 5:18 PM
> > Subject: [amibroker] Nested Loops - Custom Backtester
> >
> >
> > Hi,
> >
> > In the Custom Backtester, I need to run a nested loop to examine
> all
> > signals in comparison to a given signal, and have tried the
> following
> > code to implement a nested loop:
> >
> > for ( sig = bo.getfirstsignal(bar); sig; sig = bo.getnextsignal
> (bar))
> >
> > {
> >
> > for ( sig_2 = bo.getfirstsignal(bar); sig_2; sig_2 =
> > bo.getnextsignal(bar))
> >
> > {
> >
> > ... logic to compare signals
> >
> > }
> >
> > }
> >
> > -------------------------------------------
> >
> > But, the code executes only for the first signal in the outer
> loop.
> > I.e., it runs the inner loop perfectly, but only for the first
> signal
> > in the outer loop.
> >
> > Any clues as to what I'm doing wrong? Maybe this isn't possible?
> > Other approaches I should try?
> >
> > Thanks,
> > David Weilmuenster
> >
>
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