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 > > > > ------------------------------------ > > **** 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/ > > Yahoo! Groups Links > > > > >
