1 minute data for normal equity market would use approx 100,000 bars per year (~400,000 for forex) This would not allow much history to reach limit and make it very slow running.
-- Cheers Graham AB-Write >< Professional AFL Writing Service Yes, I write AFL code to your requirements http://www.aflwriting.com On 28/12/06, Terry <[EMAIL PROTECTED]> wrote:
Tomasz, Thanks. However, I was referring to a daily database where there is no intraday data at all. If you had a minute database, then what is the purpose of using Mixed EOD/intraday? You can simply click on daily timeframe, right? I must be missing something here. -- Terry -----Original Message----- From: [email protected] [mailto:[EMAIL PROTECTED] On Behalf Of Tomasz Janeczko Sent: Wednesday, December 27, 2006 09:57 To: [email protected] Subject: Re: [amibroker] Re: Which Folders Are Shared By Default Between Multiple AB Installations > Intraday data is NOT saved in Mixed EOD database. Incorrect. As far as mixed EOD/intraday mode is considered, intraday data ARE saved together with EOD data. This mode allows 1-minute (and any higher interval) charts (120+ days) plus long (9 years) EOD histories from the same database using just 90000 bars. Mixed EOD/intraday is available with eSignal as data source and "Mixed EOD/Intraday" option selected in File->Database Settings->Intraday Settings. Best regards, Tomasz Janeczko amibroker.com ----- Original Message ----- From: "Terry" <[EMAIL PROTECTED]> To: <[email protected]> Sent: Wednesday, December 27, 2006 5:03 PM Subject: RE: [amibroker] Re: Which Folders Are Shared By Default Between Multiple AB Installations > Intraday data is NOT saved in Mixed EOD database. It simply allows updating > of the current day's value by every new piece of data received...and it only > works with certain data suppliers. > > If you want both you can have a minute database (or whatever timeframe) and > simply view in a Daily time frame. Of course, this requires orders of > magnitude more data than a daily database and long history is not available. > -- > Terry > > -----Original Message----- > From: [email protected] [mailto:[EMAIL PROTECTED] On Behalf > Of Lester Vanhoff > Sent: Tuesday, December 26, 2006 23:28 > To: [email protected] > Subject: [amibroker] Re: Which Folders Are Shared By Default Between > Multiple AB Installations > > Thanks for clarification, TJ. I still would like to have a script that > removes old intraday data from mixed eod/intraday data files. Backfilling > intraday data for hundreds of tickers can bog down the download. I'll create > a separate thread for that. Maybe someone has such a such a script. > > Lester > > --- In [email protected], "Tomasz Janeczko" <[EMAIL PROTECTED]> wrote: >> >> > >> > 1) There were some reports on this forum from users about formulas that > got "confused" using mixed data. >> >> No, no formula can be confused if only "mixed EOD/intraday" is ON because > AMiBroker takes all overhead >> of extracing EOD data when periodicity or viewing interval is set to daily > and extracting intraday only if intraday >> viewing interval is picked. From the formula point of view it looks like > you were running separate dbs. >> >> > >> > 2) How to extract only-eod and only-intraday data for export to ASCii > files, in case you want to use that data with other charting >> > programs. >> >> AA Export >> > http://www.amibroker.com/kb/2006/03/04/how-to-export-quotations-from-amibrok > er-to-csv-file/ >> >> > >> > 3) Maintaining clean data in mixed mode sounds like a nightmare. What > about a situation when you watch some ticker in RT for a >> > week and then forget about it. You end-up with the file which is mostly > eod and has a few days of RT a few months back. A script >> > to clean this out would be needed. >> >> Not really. If you are using eSignal (which has mixed eod/intraday > supported) it is all backfilled automatically and you can go for >> vacation for 120 days >> and it will still continue to have everything automatically backfilled. In > worst case you just do "force backfill" and you end up >> with correct data. >> >> >> Best regards, >> Tomasz Janeczko >> amibroker.com >> ----- Original Message ----- >> From: "Lester Vanhoff" <[EMAIL PROTECTED]> >> To: <[email protected]> >> Sent: Tuesday, December 26, 2006 11:24 PM >> Subject: [amibroker] Re: Which Folders Are Shared By Default Between > Multiple AB Installations >> >> >> >> TJ: when having two installations in DIFFERENT folders there are NO > folders shared by default ... >> > >> > Well, I have v4.80.1 (eod) and v4.89.0 (1 minute) installed on the same > computer in different folders: >> > >> > - E:\AmiBroker >> > - E:\AmiBrokerR >> > >> > Eod database is: D:\AmiBroker\Data2 >> > RT database is: D:\AmiBroker\Data4 >> > >> > When I first tried to access AA on the new installation it just > defaulted to formulas folder from the old installation. After >> > fixing that and then trying to access AA from the old installation, it > opened formula folder from the new installation. This must >> > have something to do with the registry. Personally, I find it better to > use a single folder for both installations and have no >> > complaints. >> > >> >> TJ: You don't need two installations. From Single installation you can > run multiple times and load different databases. >> > >> > Switching between databases when you trade in real time is inconvenient. > "Mixed eod/intraday" data sounds like a solution but >> > there are a few issues: >> > >> > 1) There were some reports on this forum from users about formulas that > got "confused" using mixed data. >> > >> > 2) How to extract only-eod and only-intraday data for export to ASCii > files, in case you want to use that data with other charting >> > programs. >> > >> > 3) Maintaining clean data in mixed mode sounds like a nightmare. What > about a situation when you watch some ticker in RT for a >> > week and then forget about it. You end-up with the file which is mostly > eod and has a few days of RT a few months back. A script >> > to clean this out would be needed. >> > >> > ------------ >> > >> > --- In [email protected], "Tomasz Janeczko" <groups@> wrote: >> >> >> >> You don't need two installations. From Single installation you can run > multiple times and load >> >> different databases (File->Open database). >> >> >> >> And NO, when having two installations in DIFFERENT folders there are NO > folders shared by default, except >> >> if you set your own custom shared folders for formulas (via Prefs). > What is shared is REGISTRY - there is >> >> ONE registry entry PER WINDOWS USER. If you want separate entries you > need to login as two different Windows Users. >> >> >> >> All in all, single installation and multiple databases is easier and > better setup. >> >> >> >> Best regards, >> >> Tomasz Janeczko >> >> amibroker.com >> >> ----- Original Message ----- >> >> From: "Lester Vanhoff" <ebsn247lsm@> >> >> To: <[email protected]> >> >> Sent: Tuesday, December 26, 2006 11:54 AM >> >> Subject: [amibroker] Which Folders Are Shared By Default Between > Multiple AB Installations >> >> >> >> >> >> >I have two AB installations on the same computer (one for Eod and one > for intraday). I have noticed that when I use the second >> >> >installation some folders in AA simply default to first installation's > path. >> >> > >> >> > This is not a bad thing as it allows keeping all formulas in one > place, but I'm not sure if it's by design or by coincidence >> >> > and >> >> > which folders are affected. Right after installing the second > instance of AB I copied all files from Formulas and Formats >> >> > folders >> >> > from the first to the second instalation so now it's difficult to > figure out what's shared by default and what's not. >> >> > >> >> > Tnx >> >> > >> >> > >> >> > >> >> > >> >> > Please note that this group is for discussion between users only. >> >> > >> >> > To get support from AmiBroker please send an e-mail directly to >> >> > SUPPORT {at} amibroker.com >> >> > >> >> > For NEW RELEASE ANNOUNCEMENTS and other news always check DEVLOG: >> >> > http://www.amibroker.com/devlog/ >> >> > >> >> > For other support material please check also: >> >> > http://www.amibroker.com/support.html >> >> > >> >> > Yahoo! Groups Links >> >> > >> >> > >> >> > >> >> > >> >> > >> >> >> > >> > >> > >> > >> > Please note that this group is for discussion between users only. >> > >> > To get support from AmiBroker please send an e-mail directly to >> > SUPPORT {at} amibroker.com >> > >> > For NEW RELEASE ANNOUNCEMENTS and other news always check DEVLOG: >> > http://www.amibroker.com/devlog/ >> > >> > For other support material please check also: >> > http://www.amibroker.com/support.html >> > >> > Yahoo! Groups Links >> > >> > >> > >> > >> > >> > > > > > Please note that this group is for discussion between users only. > > To get support from AmiBroker please send an e-mail directly to > SUPPORT {at} amibroker.com > > For NEW RELEASE ANNOUNCEMENTS and other news always check DEVLOG: > http://www.amibroker.com/devlog/ > > For other support material please check also: > http://www.amibroker.com/support.html > > Yahoo! Groups Links > > > > > > > Please note that this group is for discussion between users only. > > To get support from AmiBroker please send an e-mail directly to > SUPPORT {at} amibroker.com > > For NEW RELEASE ANNOUNCEMENTS and other news always check DEVLOG: > http://www.amibroker.com/devlog/ > > For other support material please check also: > http://www.amibroker.com/support.html > > Yahoo! Groups Links > > > > > Please note that this group is for discussion between users only. To get support from AmiBroker please send an e-mail directly to SUPPORT {at} amibroker.com For NEW RELEASE ANNOUNCEMENTS and other news always check DEVLOG: http://www.amibroker.com/devlog/ For other support material please check also: http://www.amibroker.com/support.html Yahoo! Groups Links Please note that this group is for discussion between users only. To get support from AmiBroker please send an e-mail directly to SUPPORT {at} amibroker.com For NEW RELEASE ANNOUNCEMENTS and other news always check DEVLOG: http://www.amibroker.com/devlog/ For other support material please check also: http://www.amibroker.com/support.html Yahoo! Groups Links
