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
