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That depends on the system.
--- In amibroker@xxxxxxxxxxxxxxx, "Dave Merrill" <dmerrill@xxxx>
wrote:
> isn't it possible that a system that can only have a finite number
of
> positions open at once would make an entirely different sequence of
trades,
> depending on when you started? the same trades would qualify as
tradeable,
> but different ones could be entered. if the day you started, all
open
> portfolio positions were filled with trades that held for a long
period,
> locking out all other trades, the quality of those specific picks
could
> matter a lot.
>
> should it all even out after enough time? I'd think that overall
performance
> should average out, since on average the return from the trades you
entered
> and didn't enter should average out. but there's no inherent reason
to think
> that the trade lists would converge over time.
>
> dave
> From: Chuck Rademacher [mailto:chuck_rademacher@x...]
> Sent: Sunday, October 19, 2003 3:07 PM
> To: amibroker@xxxxxxxxxxxxxxx
> Subject: [amibroker] Backtest start point(s) (was various other
subjects)
>
>
> It's quite simple, really. If you have a system that generates
hundreds
> or thousands of trades and you remove (say) 1% of those trades, the
equity
> curve is unlikely to be affected very much. As Jitu says, the
equity curve
> quickly "catches up". If you have a system that doesn't trade
very often
> and you remove 10% of the trades, the resulting equity curve could
look
> quite different. Also, if Murphy's Law played a hand and the
trades you
> removed were all profitable, the effect on the rest of the equity
curve
> could be significant.
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