Hello, The point is to have long EOD histories AND intraday data. Of course AmiBroker will compress intraday to daily, but to have 9 years of daily charts you would need to have nearly one million of bars. With mixed mode you have 120 days intraday and 9 years of eod in the same database with 10 times less bars. It is about convenience, hard disk space and speed of processing.
Best regards, Tomasz Janeczko amibroker.com ----- Original Message ----- From: "Terry" <[EMAIL PROTECTED]> To: <[email protected]> Sent: Wednesday, December 27, 2006 6:23 PM Subject: RE: [amibroker] Re: Which Folders Are Shared By Default Between Multiple AB Installations > 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 > > > > >
