|
PureBytes Links
Trading Reference Links
|
Hello,
You are mixing two completely different things:
streaming with backfilling. Although many sources allows to stream
hundreds of symbols, they usually are not able to BACKFILL
more than very few (sometimes only 1) symbol at a time.
The difference is so big because backfill for ONE symbol
can be several megabytes in size. While streaming is just one quote (few bytes) at a time.
And QuoteTracker does not allow you to backfill more than once at a time.
What you should do is to TURN OFF
"wait for backfill", because once data are backfilled there is no need to backfill
again. So procedure is as follows:
1. BEFORE trading session start just backfill all symbols
2. Turn OFF wait for backfill
3. From now on all scans will take few SECONDS for 60 symbols.
Best regards,
Tomasz Janeczko
amibroker.com
----- Original Message -----
From: "przemyslawuk" <przemyslawuk@xxxxxxxxxxx>
To: <amibroker@xxxxxxxxxxxxxxx>
Sent: Tuesday, May 13, 2008 12:12 AM
Subject: [amibroker] AA "wait for backfill" -how to sped up the process???
> Hello,
>
> I use AA and "wait for backfill" to fill the charts with data.
> The problem is that AB does it sequentially - it requests backfill,
> collects the data,and then requests the backfill for another symbol.
> It is a very inefective way as IQFeed allows for hundreds of symbols to
> be watched at a time. This is done for example by QuoteTracker.
> The AB process of scanning 60 symbols takes 18min.
>
> Is there a way of calling data update from AB for multiple symbols at
> a time so it does not have to be done sequentially?
> Or maybe this is something for Tomasz to consider for future versions
> of AB.
>
>
> Cheers,
> Przemyslaw
>
>
> ------------------------------------
>
> 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
<*> To visit your group on the web, go to:
http://groups.yahoo.com/group/amibroker/
<*> Your email settings:
Individual Email | Traditional
<*> To change settings online go to:
http://groups.yahoo.com/group/amibroker/join
(Yahoo! ID required)
<*> To change settings via email:
mailto:amibroker-digest@xxxxxxxxxxxxxxx
mailto:amibroker-fullfeatured@xxxxxxxxxxxxxxx
<*> To unsubscribe from this group, send an email to:
amibroker-unsubscribe@xxxxxxxxxxxxxxx
<*> Your use of Yahoo! Groups is subject to:
http://docs.yahoo.com/info/terms/
|