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I don't use long backfills but I do have what could be a related issue. I use a symbol list that I found on IQFEED of US symbols. I have no idea how IQFEED finds these symbols but I think there are about 6300 of them. I select from that list with my formula so I generate many fewer orders. I am wondering if that number of symbols is causing a problem. If I were industrious, I could probably eliminate more than 3000 of them from consideration and end up with a much more manageable database. I think that will be my next task because, based on the responses so far, it seems that it must be something fairly unique to me.
Thanks again,
MS
--- In amibroker@xxxxxxxxxxxxxxx, "Tomasz Janeczko" <groups@xxx> wrote:
>
> Hello,
>
> http://www.amibroker.com/video/IQFeed.html
>
> This video demonstrates far far more than 180 days backfill using IQFeed.
>
> Best regards,
> Tomasz Janeczko
> amibroker.com
> ----- Original Message -----
> From: Keith McCombs
> To: amibroker@xxxxxxxxxxxxxxx
> Sent: Friday, October 30, 2009 12:54 AM
> Subject: Re: [amibroker] IQFEED AMIBROKER PROBLEMS
>
>
>
>
> Are you trying to use long backfills? I don't believe anyone has been able to get 180 day backfills to work properly.
>
> trfy1120 wrote:
>
> Is anyone else having problems with IQFEED and Amibroker? In my case, I have had trouble with duplicate data. That is, for example, my database will have data for 10/29 preceded by data from 10/28 and then more data for 10/29. You can only see this when you look at the quote editor. It don't think it shows up in the charts but it does affect formula computations referring to previous bars.
>
> Today, my system is dropping data that were previously in the database.
>
> I think I am following the video database tutorial and I have contacted support without much luck. Does anyone else have any idea what may be going on?
>
> By the way, I use IQFEED to feed other programs so I don't think it is an IQFEED problem.
>
> Thank you,
>
> MS
>
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