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I'm looking for the same thing, Angelo, I wish there was more inbuilt
support in Ami for pair trading/testing :) The way I'm dealing with
it for now is to utilize foreign() calls, which can be agonizingly
slow for large amounts of data, and test the strategy based on the
synthetic/pair, where you enter/exit based on the synthetic price and
all statistics based on that. Also, It's very important to include
SetOption("priceBoundChecking",False);
SetOption("DisableRuinStop",True);
Without disableruinstop, it seems anytime when there's enough data to
enter/exit one leg but no data at the same time for the other security
you hedge with, the backtester will kick you out of the position with
some ridiculous price, and your results will be entirely incorrect.
Without priceboundchecking, you may not be able to generate the
synthetic pair value if the pricing is off. It took several emails to
Ami support and browsing for posts here for me to figure out these two
options were necessary for backtesting my setup, wish I'd known
earlier :) If you or anybody else has any better ideas, I'm all up for
it...
--- In amibroker@xxxxxxxxxxxxxxx, "ang_60" <ima_cons@xxx> wrote:
>
> --- In amibroker@xxxxxxxxxxxxxxx, "janhausd" <janhaus@> wrote:
> >
> > Hi Angelo,
> >
> > I have in fact just recently contacted Herman regarding this subject,
> > since running that code on my data resulted in mismatching
> > correlations, where Correl(A,B) was not equal to Correl(B,A) due to
> > the Foreign() function and data holes between A and B. The result is
> > actually somewhat similar to the the picture herman posted in that
> > link, where you see that the correlation between AAPL,ALTR is -0.624,
> > whereas ALTR,AAPL is 0.421, except when I ran the code, all of the
> > pairs mismatched and not just the ones on the outer edge of the
> > correlation square. Anyway, if you have data without mismatching
> > times, this shouldn't be a problem :)
> >
>
>
> Thanks jan,
>
> this problem is clear to me now.
>
> I'm on my way to build a pair system on amibroker, using as a template
> the code posted by TJ on this list some time ago.
>
> My code is pretty simple and open a position for symbol1, and - at the
> same time - an opposite position for symbol2.
>
> Of course ,in the report this trade is counted as "two" and this makes
> unuseful of all the statistics based on the total nauber of trades
> (e.g. percent winners... profit per trade... ).
>
> As anyone thought of a way of telling Amibroker that - in this
> particular case - the 2 trades representing both leg of the pair
> should be counted as one?
>
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