Hello, If your data base collection is set to tick, then never backfill during trading day. Probably something to due with time stamp of 'ticks'. Plus you only back fill hand full of price bars. My data base is set to 5 sec.
Had an AB chart problem today (very rare) and lost over 20 minutes of data, with data base setting set to 5 sec. backfilled ok. Using vol bar charts and diff between 5 sec vs tick isn't worth the loss of having backfill data if needed. Regards, Jerry Gress Stockton, Ca. -----Original Message----- From: [email protected] [mailto:[EMAIL PROTECTED] On Behalf Of Carl Vanhaes Sent: Wednesday, October 08, 2008 12:23 AM To: [email protected] Subject: [amibroker] IB backfill: all my ticks disappeared... I noticed a strange thing: for some days already I was surprised to see gaps in my data for the day before while I was pretty sure that the day before all data were recorded, tick after tick for the 20 symbols I am following from IB. I know it is not really tick-by-tick but rather 0.2/0.3 seconds interval but anyway: when I launch AB in the morning it does an automatic IB backfill and actually what happens is that almost all data for the day before are deleted and replaced, for the last 15 minutes of trading session, by a kind of compressed bars which never took place in that time compression frame(I use 75-tick for charting). And the bars before just disappeared! I now switched to 1-minute backfill in database settings and will se what happens. My point/question is: when you are connected to IB from the beginning of the session it is probably better not to backfill at all, right?? Thank you, Carl ------------------------------------ **** IMPORTANT **** This group is for the discussion between users only. This is *NOT* technical support channel. ********************* TO GET TECHNICAL 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
