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Hi,
If you mean that for each symbol tested, you cannot allow a Buy before
that particular symbol has had at least 2 years of history, then you
can add logic to your buy condition to that effect.
e.g.
Assuming 252 trading days/year (USA markets), you can include a
condition that at least 252 * 2 = 504 days have passed.
Try something like the following (untested) code which is assuming EOD
data:
History = Cum(1);
Buy = History >= 504 AND ...; // fill in your buy logic here.
Mike
--- In amibroker@xxxxxxxxxxxxxxx, "tickhillblade" <tickhillblade@xxx>
wrote:
>
> Hi all,
>
> I am a new user of Amibroker and I am trying to backtest a system I
> have thought about for many years but have not had any software to
> perform this before last week.
>
> I have a problem and am looking for some help.
>
> Due to different symbol start dates I need to generate the buy or
sell
> signal after a two year period.
>
> i.e. AZN.L data starts on 01/01/2003, the first transaction cannot
be
> before 01/01/05. Whilst I can manually set this in the analyser for
> each share I would like to automate it using AFL.
>
> All help would be much appreciated.
>
> Bill
>
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