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Thanks for your sharing thoughts.
With my configuration, running AB when datasource is TC2000/TCnet
plugin is slower than running it when it is set to (local database).
That is why I needed to switch to the local data base after updating
the TC200oTCnet database. Infact, this procedure was recommended to me
by Tomaz somemonths ago through AB support as a means to speed up my
backtesting.
--- In amibroker@xxxxxxxxxxxxxxx, "NW Trader" <pk47hargus@xxxx> wrote:
> Hi dbirru,
>
> I'm confused by your procedure as it is certainly not what I do.
>
> After updating your TC2005 data, why do you "run scan over the whole
> database"? If you use the F5 key or click View--> Refresh or simply
close
> and reopen AB, you will have updated the AB database. The TC data
plug in
> makes it unnecessary to retrieve anything from the TC data base,
except when
> you want to bring in new tickers that have been added since you set
up your
> AB TC data folder. One of the joys of AB is that it reads the data
directly
> from the TC database with it's plug in so there is no "importing"
data into
> AB with TC2005.
>
> My setup and procedure. Under the Database Settings (File --> Database
> settings), the Data source is the TC2000/TCNet Plugin and Local data
storage
> is set to Enable. After updating in the TC program, I click F5 and
the data
> is now updated in AB -- takes about 3 seconds on one fast machine,
about 6
> seconds on a second slower machine.
>
> When you do run scans or explorations, the first run will be slower
as it
> loads data into the cache, there after the same scan or exploration
will run
> faster. To learn a bit more about how AB handles external data
(like TC)
> read the Help Tutorial section on Database Management, Understanding
> AmiBroker database concepts.
>
> Peace and Justice --- Patrick
> ----- Original Message -----
> From: dbirru
> To: amibroker@xxxxxxxxxxxxxxx
> Sent: Friday, June 24, 2005 6:36 PM
> Subject: [amibroker] Re: New, fixed TC2000/TCNet/TC2005 data plugin
>
>
> Thanks for this. The problem is fixed.
>
> However, I am not able to see the difference b/n this and the old one.
> I use EOD data. Is this update for realtime/intra-day date?
>
> What I have been looking for is a way to reduce the time that takes to
> convert the TC2005 data to the native database. Normally, I first
> dawnload using TC2005. I then start AB and run scan over the whole
> databse. I then close AB so that the data is saved in AB native
> database. I then restart AB. Change the database to local. Then
> continue my backtesting. This whole process takes about 15-20minutes.
>
>
>
> --- In amibroker@xxxxxxxxxxxxxxx, "Tomasz Janeczko" <amibroker@xxxx>
> wrote:
> > Hello,
> >
> > A new, fixed TC2000/TCNet/TC2005 data plugin version 1.4.3 is
> available now
> > for download from:
> > http://www.amibroker.com/bin/TC2K.dll
> >
> > Installation:
> > Download and copy to Plugins subfolder. Please OVERWRITE old copy
> > ( if you keep two copies then older one will be loaded ).
> >
> > Changes:
> > + fixed crash occuring when "Number of Bars to Load" was set to 4000
> or higher (15 years)
> > and given symbol had longer history in TC2000 (mainly indices)
> >
> > + workaround for TCDK problem of not returning entire history
available:
> > if "number of bars" specified by the user is 5000 or higher than
> TCDK is
> > queried with size = 0, which in TCDK-speak means "all quotes".
> > To get all quotes set "Number of bars" to value equal or higher
> than 5000
> > (note that some indices (Sp-500) have about 11000 bars)
> > To get better performance specify LESS than 5000 bars (19 years
> worth of data)
> >
> > + View->Refresh All menu causes re-initialization of TCDK and
> getting updated quotes for today
> > (even during trading session)
> >
> >
> > How to get new quotes during trading session and after close:
> > Now in order to get fresh quotes you need to choose
View->Refresh All
> > menu from AMiBroker after running download in TC2000.
> >
> > In order to get fresh quotes the plugin needs to internally restart
> TC2000 API (TCDK),
> > it is done automatically by the plugin but takes about 5-15 seconds
> (depending on machine speed)
> >
> > This is due to the design of TC2000 API that feeds all external
> applications
> > with old quotes until entire API (TCDK) is restarted, which is
> unfortunatelly long process.
> >
> > By the way, people looking for EOD data source for extensive data
> mining
> > should take a look at Quotes Plus (QP2) which is several times
> faster and less
> > resource consuming than TC2000.
> > (there is a link to QP2 on AmiBroker page)
> >
> >
> > Best regards,
> > Tomasz Janeczko
> > amibroker.com
>
>
>
>
>
> 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 other support material please check also:
> http://www.amibroker.com/support.html
>
>
>
>
>
>
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