Thanks for your reply Tomasz ,
I had seen the AMA, but in my case does not go well,
because the calculation is done on the bar above to 5 minutes time frame, not
the value of the previous day !!!
Then I have a similar problem with 'devst1' variable.
I put the formula in full so that you can possibly correct it ...
Invest = 100000;
SetOption( "InitialEquity",Invest);
SetOption( "MaxOpenPositions",1);
PositionSize=Invest;
ApplyStop(0,0,0,0);
ApplyStop(1,0,0,0);
ApplyStop(2,0,0,0);
SetTradeDelays(0,0,0,0);
TimeFrameSet(in5Minute);
Timeopen=TimeNum()==090500 ;
Timeclose=TimeNum()==172500 ;
Time1630=TimeNum()==163000 ;
O_OGGI=ValueWhen(Timeopen,O,1);
C_OGGI=ValueWhen(Timeclose,C,1);
T_1630=ValueWhen(Time1630,C,1);
Yield1=((T_1630/O_OGGI)-1)*100;
alpha=0.02;
avrg1=(1-alpha)*Ref(avrg1,-1)+alpha*yield1; //for the first day of chart
avrg1=yield1;
dvst1=sqrt((1-alpha)*Ref(dvst1,-1)*Ref(dvst1,-1)+alpha*(yield1-avrg1)*(yield1-avrg1));
//for the first day of chart dvst1=1;
Input1=IIf((Yield1>2*dvst1),1,IIf((Yield1<-2*dvst1),-1,Yield1/(2*dvst1))));
kappa1=Param("kappa1", 0.3, 0, 1, 0.05);
kappa2=Param("kappa2", -0.3, -1, 0, 0.05 );
Buy=Time1630 AND Input1 >= kappa1;
Sell=Timeopen;
Short=Time1630 AND Input1 <= kappa2;
Cover=Timeclose;
BuyPrice=C;
SellPrice=O;
ShortPrice=C;
CoverPrice=C;
Buy=ExRem(Buy,Sell);
Sell=ExRem(Sell,Buy);
Short=ExRem(Short,Cover);
Cover=ExRem(Cover,Short);
PlotShapes( shapeUpArrow* Buy , colorBlue ,0,L);
PlotShapes( shapeHollowUpArrow* Cover ,colorBlue ,0,L);
PlotShapes( shapeHollowDownArrow* Sell,colorRed ,0,H);
PlotShapes( shapeDownArrow* Short, colorRed ,0, H);
Plot(C,"",colorBlack,styleCandle);
_N(Title = StrFormat("{{NAME}} - ANG Last_H System - {{INTERVAL}} {{DATE}} -
Open %g, Hi %g, Lo %g, Close %g (%.1f%%) Vol " +WriteVal( V, 1.0 ) +"
{{VALUES}}", O, H, L, C, SelectedValue( ROC( C, 1 ) ) ));
eq=Param("equity",1,0,1,1);
equi=IIf(eq==0,Null,Equity( ));
Cover1=Flip(Cover,Short);
Short1=Flip(Short,Cover);
Buy1=Flip(Buy,Sell);
Sell1=Flip(Sell,Buy);
Plot(
Equi-Invest,"\n\Equity",IIf(Buy1,colorPaleTurquoise,IIf(Short1,colorRose,colorLightGrey)),
styleArea+styleLeftAxisScale);
dr = Equi- Highest(Equi);
Plot(dr, "Drawdown", colorDarkRed, styleArea+styleLeftAxisScale );
Maxdr=LLV(dr,100000);
Plot( Maxdr , "Max Drawdown", colorDarkRed, styleLine+styleLeftAxisScale );
Sorry for my bad English, I am an Italian boy.
--- In amibroker@yahoogroups.com, "Tomasz Janeczko" <gro...@...> wrote:
>
> Hello,
>
> There is a DEDICATED function that implements just that called AMA
>
> xxx = AMA( yyy, alpha );
>
> http://www.amibroker.com/f?ama
>
>
> Best regards,
> Tomasz Janeczko
> amibroker.com
> ----- Original Message -----
> From: "Angio" <angio1...@...>
> To: <amibroker@yahoogroups.com>
> Sent: Thursday, August 06, 2009 7:08 PM
> Subject: [amibroker] Error 29, variable 'xxx' without having been initialized
> !!!
>
>
> > how can I solve this problem in the AFL code?
> >
> > xxx=(1-alpha)*Ref(xxx,-1)+alpha*yyy;
> >
> > the variable xxx must be set to 1 for the first day !!!
> >
> >
> >
> >
> >
> >
> > ------------------------------------
> >
> > **** 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
> >
> >
> >
>
