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I think you have proven that the setting in database
properties limits the max number of bars per symbol. So it is
not a secret anymore.
In my case dealing with futures I wanted to save a whole
contract (3 months) worth of tick data per symbol. I had to
increase the number of bar to 800,000 Some symbols have
reached 23 MB in size.
Joseph Biran
____________________________________________
-----Original Message-----
From: amibroker@xxxxxxxxxxxxxxx
[mailto:amibroker@xxxxxxxxxxxxxxx] On Behalf Of Barry
Scarborough
Sent: Monday, February 11, 2008 8:26 PM
To: amibroker@xxxxxxxxxxxxxxx
Subject: [amibroker] Re: Is database limited by the number of
bars in database setting?
Yea good luck! It must be a secret. I have the same problem
and asked
why about 5 times and no one ever answered why. I hope you get
an
answer because I would really like to know why too. I keep
importing
data from back up files and it keeps going poof. I have a 320
gig HD so
space isn't a problem. Keeping the data around is a problem. I
had
imported data for qqqq back to 2/14/07 in January and I just
looked at
it and it now starts in June. I'll be interested in the reply
you get.
Cheers,
Barry
--- In amibroker@xxxxxxxxxxxxxxx, "wonet2001" <wonet2001@xxx>
wrote:
>
> it's a intraday 1 minute database with IB datafeed, the
number of
bars
> in database setting is 30,000, I noticed that the database
is limited
> to 30000 bars no matter how long I have accumulated data, my
purpose
is
> to accumulate more than six months data for backtesting, but
seems I
> keep loosing old data as time goes by.
>
> what is the solution? should I make the number of bars
bigger, say
> 500,000? will it affect the performance of AB for my
intraday trading?
>
> thanks
>
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