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Hi Terry and Tomasz,
My apologies for not knowing the settings of Backtester deep enough,
and thank you so much for your excellent support.
My Limit trade size was set to 10, which I believe was the default
setting. As it turned out, my equity grew so big and I was only
taking 10% trade size against stock's daily volume. I believe that
was the reason why my long-term backtest escaped the year 2004 without
much damage, while the short-term result got hit.
Regards,
intermilan04
--- In amibroker@xxxxxxxxxxxxxxx, "Tomasz Janeczko" <amibroker@xxx> wrote:
>
> Hello,
>
> Yes it checks by default if you don't exceed 10% of day's volume.
> You can adjust / turn it off in AA Settings->Portfolio:
> "Limit trade size as % of entry bar volume"
>
> This is explained in the User's Guide;
> http://www.amibroker.com/guide/w_settings.html
>
> Best regards,
> Tomasz Janeczko
> amibroker.com
> ----- Original Message -----
> From: "intermilan04" <intermilan04@xxx>
> To: <amibroker@xxxxxxxxxxxxxxx>
> Sent: Thursday, June 08, 2006 4:13 PM
> Subject: [amibroker] Re: Interpreting backtest results
>
>
> > Terry,
> >
> > At this point I am thinking maybe the backtester checks for particular
> > stock's volume and wouldn't let me buy more than that. So the
> > long-term case had too much money, cannot use all the money into
> > stocks, thus resulted in smaller loss.
> >
> > This is sort of like a situation where I have $10000, spend $100 on a
> > stock and blow it all. Sure, the $100 is gone, but I still have $9900
> > left.
> >
> > I am yet to verify if this is indeed the case, but if it was, I am
> > afraid backtester wouldn't work too well for a long-term simulation.
> >
> > Regards,
> >
> > intermilan04
> >
> > --- In amibroker@xxxxxxxxxxxxxxx, "Terry" <MagicTH@> wrote:
> >>
> >> Max System Drawdowns are compared to available equity. Your long term
> >> test has tons of available equity so the losses by comparison are
small.
> >> --
> >> Terry
> >> -----Original Message-----
> >> From: amibroker@xxxxxxxxxxxxxxx [mailto:amibroker@xxxxxxxxxxxxxxx] On
> >> Behalf Of intermilan04
> >> Sent: Wednesday, June 07, 2006 21:17
> >> To: amibroker@xxxxxxxxxxxxxxx
> >> Subject: [amibroker] Interpreting backtest results
> >>
> >> Hi all,
> >>
> >> I'm having trouble interpreting the result of my backtest where:
> >>
> >> 1) When I backtested my system between 1996-2006, my equity as of
> >> 2004/1/1 was 239,047,456 and 2004/12/31 was $235,772,048, loss of 2%
> >> for the year of 2004.
> >>
> >> 2) when I backtested THE SAME SYSTEM from 2004/1/1 to 2004/12/31
(just
> >> that particular year of 2004), my equity goes from $30000 to $19417
> >> for a loss of whooping 35% for the year of 2004.
> >>
> >> Although the amount of money is different for the former and the
> >> latter, the backtester makes same trades throughout 2004 (i.e. if the
> >> former trades ABC on 2004/3/3, so does the latter). I split my funds
> >> evenly among 4 trades at once. However, the former only loses 2%
> >> throughout the year of 2004 while the latter loses 35%.
> >>
> >> If anyone has seen something like this, could you please explain
as to
> >> why this may occur?
> >>
> >> Thank you in advance,
> >>
> >> intermilan04
> >>
> >>
> >>
> >>
> >>
> >>
> >>
> >> 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 other support material please check also:
> >> http://www.amibroker.com/support.html
> >>
> >>
> >> Yahoo! Groups Links
> >>
> >
> >
> >
> >
> >
> >
> >
> > 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 other support material please check also:
> > http://www.amibroker.com/support.html
> >
> >
> > Yahoo! Groups Links
> >
> >
> >
> >
> >
> >
> >
> >
>
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