I am running the same versions you are, and only a couple of times in 3 months of testing was I ever able to get a 180 backfill from IB. Once in a while I can get 30 days (though even those often get throttled).
I have resorted to just buying some historical data from a vendor, and then relying on IB to keep the symbols up to date with new data every day - only have to backfill a day or two, which is no problem. --- In amibroker@yahoogroups.com, Keith McCombs <kmcco...@...> wrote: > > 30 day backfill seems to work Ok. > Has anybody tried a 180day backfill for 1 minute data? > Success? or Not? > Thank you. > -- Keith > > Keith McCombs wrote: > > > > > > This is probably a cockpit problem, and its driving me bonkers. > > > > I just started using IB TWS (893.9) intraday data with AB5.20 and IB > > plugin 1.8.2. I only have 8 equities in the data base. First, tried to > > backfill all at once, with 180 days of data. > > > > Soon gave up on that and decided to concentrate on only SPY. I know > > that I can't get the full 180days at once because TWS will throttle back > > and so AB waits for 2 minutes and then tries to get the rest. > > > > Well the first run at, AB gets data from 8/5/08 to 11/21/08, then waits > > 2 minutes and try again. I'm expecting that it will then start at > > 11/22/08 and begin filling forward. NOPE, now I have only 9/18/08 to > > 4/21/08 with most days ending at 2:59 instead of 3:59. Two minutes > > later, start again, and now we have only 11/13/08 to 4/21/08, but with a > > gap from 11/21/08 to 1/5/09. The longer it runs the worse it gets. > > > > Oops -- just checked and Number of bars was 32000. But I distinctly > > remember setting it to 130000 for 270 days worth. So I try again, after > > setting Number of bars back to 130000, and double checking it. > > Now I have SPY with data from 9/26/08 9:30am to 1/6/09 4:00pm and AB > > gives message saying it is done with SPY. I then try AAPL it eventually > > finished with data from 8/28/08 9:30am to 3/6/09 3:59pm; and then from > > 3/9/09 to 3/20/09 all data starts at 9:30am and stops at 2:59pm (that's > > right someone stole the last hour of trading for 10 trading days (bet > > that has something to do with DST starting on 3/8/09). No more data > > after 3/20/09. > > > > Besides the above major problems I have some other concerns, namely: > > 1. When and why should I use Save Database? > > 2. Colored status box for CONN, etc. is sometimes blue and sometimes > > green, meaning what? > > 3. When I hover my cursor over that status boxes it sometimes displays > > a message and sometimes not, and when it does it's usually for less time > > than it takes me to read the message. > > 4. With number bars set for 270 days, I'm hoping that I can get 180 > > days back now and that with time, I can have a maximum of 270 days of > > data. Can I then increase Number of days to say 360 and keep adding to > > the data base, or does data base get erased every time I change the > > Number of Bars value? > > > > I hope there is some one who is not as overwhelmed by all this as I am. > > -- Keith > > > > >
