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Hello,
You should configure your database exactly as shown in the video:
http://www.amibroker.com/video/IQFeed.html
As shown in the video "Base time interval" should be set to 1 (ONE) minute.
15-minute data are not available directly from DTN (only tick, 1-minute
and daily).
Then to use 15-minute data use View->Intraday->15 minute menu.
If you set base time interval to 15-minutes, the plugin will take 1-minute
data it receives from DTN and compress it. If resulting datetime stamp
is 10:32
it means it was the very first 1-minute bar that DTN returned in given
15-minute period.
But as long as it is done inside plugin you don't see it (because you
don't see received 1-minute data).
Therefore you NEED TO use base time interval of ONE MINUTE. Then you
will see in quotation
editor underlying 1-minute data and everything will be clear. Also you
will be able to force timestamps to
be on boundary (even if there is no data) using
Tools->Preferences->Intraday "Show start time of interval"
setting.
Best regards,
Tomasz Janeczko
amibroker.com
On 2010-01-21 03:14, dwrowley_2000 wrote:
> I have a system that has been running perfectly for the last few months, but then yesterday it started showing a strange problem. I use a 15-minute database, and part of my system uses a composite indicator that is run against a list of stocks.
>
> Just yesterday, I started seeing timestamps on quotes within Amibroker that weren't on 15-minute boundaries (ie. 10:32AM, etc.) I can believe that certain stocks don't trade until a couple of minutes into the bar, but I thought AB was supposed to always align the data so that it would show as a bar time of 10:30AM.
>
> Also, when I run the composite, it seems like each bar of the resulting composite is stamped with the latest time within that bar of the data on which it is run (that is, if 10 stocks show an opening value at 10:30, 5 at 10:31 and 3 at 10:32, then the composite indicator will show a timestamp for that bar of 10:32 (the latest time)).
>
> Any ideas why this is happening, and why it just started in the last day or so?
>
> I'm using AB 5.26, but this new bad behavior is the same now on 5.20, 5.29, etc.
>
> I've tried 4.6.1.0 as well as an old 4.4.0.3 client - no change
>
> Here are a couple of images to explain:
>
> Shows problem composite indicator -- time of bar shows as 10:33
> http://img.skitch.com/20100121-1q2sefe3634jh8g3rbq17uqdcs.jpg
>
> And a dump of one day's data for the composite indicator:
> http://img.skitch.com/20100121-drb1rbajcaxnrparxhd77hrmt4.jpg
>
> Any ideas? Pointers, suggestions, much appreciated.
>
> Regards,
> David
>
>
>
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------------------------------------
**** IMPORTANT PLEASE READ ****
This group is for the discussion between users only.
This is *NOT* technical support channel.
TO GET TECHNICAL SUPPORT send an e-mail directly to
SUPPORT {at} amibroker.com
TO SUBMIT SUGGESTIONS please use FEEDBACK CENTER at
http://www.amibroker.com/feedback/
(submissions sent via other channels won't be considered)
For NEW RELEASE ANNOUNCEMENTS and other news always check DEVLOG:
http://www.amibroker.com/devlog/
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