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 [email protected], "wonet2001" <[EMAIL PROTECTED]> 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 >
