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[amibroker] Re: Portfolio rotation



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Ha - yeah I hear you - I was actually working on the example when you
posted the code.  The issue with your example (mine is still not
working) is that it has entries long or short, that are not on the
first trading day of the month.

--- In amibroker@xxxxxxxxxxxxxxx, "Tomasz Janeczko" <groups@xxx> wrote:
>
> Hello,
> 
> Taking the example and modifying it to fit your requirements is just
a matter
> of minutes ! Don't be lazy.
> 
> EnableRotationalTrading(); 
> EachPosPercent = 5; 
> 
> PositionScore = ROC( C, 20 ); 
> 
> PositionSize = -EachPosPercent; 
> 
> SetOption("WorstRankHeld", 40 );
> SetOption("MaxOpenPositions", 20 ); 
> 
> SetOption("UseCustomBacktestProc", True ); 
> 
> if( Status("action") == actionPortfolio )
> {
>   bo = GetBacktesterObject();
>  
>   bo.PreProcess(); // Initialize backtester
>   
>   mo = Month();
> 
>   monthchange = mo != Ref( mo, -1 );
> 
> 
>   for(bar=0; bar < BarCount; bar++)
>   {
>    bo.ProcessTradeSignals( bar );
>   
> 
>    if( monthchange[ bar ] )
>    {  
>    CurEquity = bo.Equity;
>   
>    for( pos = bo.GetFirstOpenPos(); pos; pos = bo.GetNextOpenPos() )
>    {
>     posval = pos.GetPositionValue();
>    
>     diff = posval - 0.01 * EachPosPercent * CurEquity;
>     price = pos.GetPrice( bar, "O" );
>    
>     // rebalance only if difference between desired and
>     // current position value is greater than 0.5% of equity
>     // and greater than price of single share
>     if( diff != 0 AND
>         abs( diff ) > 0.005 * CurEquity AND
>         abs( diff ) > price )
>     {
>      bo.ScaleTrade( bar, pos.Symbol, diff < 0, price, abs( diff ) );
>     }
>    }
> 
>   }
>   }
>   bo.PostProcess(); // Finalize backtester
> }
> 
> 
> Best regards,
> Tomasz Janeczko
> amibroker.com
> ----- Original Message ----- 
> From: "droskill" <droskill@xxx>
> To: <amibroker@xxxxxxxxxxxxxxx>
> Sent: Saturday, March 15, 2008 10:34 PM
> Subject: [amibroker] Re: Portfolio rotation
> 
> 
> > This example shows rebalancing to a fixed % at any time - is there an
> > example that shows rebalancing on a specific day - I'm trying to
> > rebalance on a first trading day of the week or month.
> > 
> > Any help greatly appreciated Tomasz!
> > 
> > --- In amibroker@xxxxxxxxxxxxxxx, "Tomasz Janeczko" <groups@> wrote:
> >>
> >> Yes you can and there  is an example code posted:
> >> http://www.amibroker.com/kb/2006/03/06/re-balancing-open-positions/
> >> 
> >> 
> >> Best regards,
> >> Tomasz Janeczko
> >> amibroker.com
> >> ----- Original Message ----- 
> >> From: "droskill" <droskill@>
> >> To: <amibroker@xxxxxxxxxxxxxxx>
> >> Sent: Saturday, March 15, 2008 5:34 PM
> >> Subject: [amibroker] Portfolio rotation
> >> 
> >> 
> >> > Hey all - I've been looking at the automatic portfolio rotation
> >> > feature of AB, and I had a question - if I want to control the time
> >> > element of the rotation, would I have to use the regular
backtester?
> >> > 
> >> > In other words, let's imagine that instead of rebalancing
"on-demand"
> >> > - let's imagine that I want to only rebalance once per week or once
> >> > per month - can I do this with the rotational portfolio?
> >> > 
> >> > Thanks!
> >> > 
> >> > 
> >> >
> >
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> > Please note that this group is for discussion between users only.
> > 
> > To get support from AmiBroker please send an e-mail directly to 
> > SUPPORT {at} amibroker.com
> > 
> > For NEW RELEASE ANNOUNCEMENTS and other news always check DEVLOG:
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> > 
> > 
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>



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