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QT definitely has inferior performance due to their limited bandwidth ... of
course it's free. Switching to iqfeed improved performance greatly, so it is
clearly much better th QT. I have really not streesed it very much, but I
have not noticed anything detrimental in what I do.
A
----- Original Message -----
From: "przemyslawuk" <przemyslawuk@xxxxxxxxxxx>
To: <amibroker@xxxxxxxxxxxxxxx>
Sent: Sunday, December 07, 2008 3:35 PM
Subject: [amibroker] Re: delays on iqfeed?
> Hi,
> I have exactly the same problem. I t very frustrating to watch my
> charts moving, updating for 3 minutes after market close !!!
> And it is with 4 symbols only.
> I don't think the delay is AB fault (although I get a lot of problems
> with real time data feed which are definitively AB problems).
> I had IQfeed subscription to AB data feed and because of that delay
> I decided to switch to QuoteTracker data feed from IQFeed and I still
> get that delay, even with only one symbol streaming.
> You can try it yourself, QT is free and will work with AB data feed.
> Add one symbol to the portfolio and at the end of the day you will get
> that delay. In my case it actually works well until lunch and then the
> delay starts increasing.
>
> I was bombarding IQFeed with emails but they obviously say it is AB
> or my internet connection. I tryied with 3 different internet links
> and still the same problems. So it is IQFeed.
> It was working fine before this volatility came to the markets and
> whats irritating is that the problem doesn't go away on the "quiet"
> days now.
>
>
> --- In amibroker@xxxxxxxxxxxxxxx, "sidhartha70" <sidhartha70@xxx> wrote:
>>
>> TJ is. Why?
>>
>> --- In amibroker@xxxxxxxxxxxxxxx, "gsmservplus" <domantas.rudys@>
>> wrote:
>> >
>> > who is developing IQFeeD plugin for AB?
>> >
>> > --- In amibroker@xxxxxxxxxxxxxxx, "Tomasz Janeczko" <groups@>
>> > wrote:
>> > >
>> > > You can also backfill after market close. And no, it is not AB
>> > fault or bug.
>> > > AmiBroker just displays what it receives from data source.
>> > > Data quality is solely dependent on data vendor.
>> > >
>> > > Best regards,
>> > > Tomasz Janeczko
>> > > amibroker.com
>> > > ----- Original Message -----
>> > > From: "gsmservplus" <domantas.rudys@>
>> > > To: <amibroker@xxxxxxxxxxxxxxx>
>> > > Sent: Sunday, December 07, 2008 3:14 PM
>> > > Subject: [amibroker] Re: delays on iqfeed?
>> > >
>> > >
>> > > >
>> > > > tomasz,
>> > > >
>> > > > not everybody can do backfill before market open.i switch on my
>> > pc at
>> > > > 12 ET and i`ve got 200 ticker in my database. so, is it only
>> > chance
>> > > > to solve this problem to do like you said?
>> > > > and one more question.is it AB fault? because IQfeed cust serv
>> > said
>> > > > is everything alright from they side.
>> > > > any chance to fix it in the future if its AB bug?because it is
>> > > > nightmare, i f***d my database last thursday doing backfill like
>> > you
>> > > > said through AA explore and wait for backfill ticked,but at 12
>> > > > ET.half of my database was with a wrong data.and even when i try
>> > to
>> > > > backfill it today wrong data stays.only "force to backfill" could
>> > > > help me.lost half a day to fix my database.
>> > > > thanks for your time
>> > > >
>> > > >
>> > > >
>> > > >
>> > > >
>> > > > --- In amibroker@xxxxxxxxxxxxxxx, "Tomasz Janeczko" <groups@>
>> > > > wrote:
>> > > >>
>> > > >> Hello,
>> > > >>
>> > > >> It was discussed in the past. Correct procedure with IQFeed is
>> > > >> to start before market open, run single scan with "wait for
>> > > > backfill"
>> > > >> turned on. Do this BEFORE market open so IQFeed works faster.
>> > > >>
>> > > >> Once all symbols are backfilled and up-to-date you can turn this
>> > > >> check box off and all symbols would stream and kept up-to-date.
>> > > >>
>> > > >> Please keep in mind that depending on symbols you use there can
>> > > >> be few hundreds of ticks per second per symbol to be processed,
>> > > >> so if you are tracking say 500 symbols, on high-activity periods
>> > > >> (such as market open) you can receive as many as 50000 updates
>> > per
>> > > > second.
>> > > >> Each update is about 100 bytes, so to transfer such amount of
>> > data
>> > > >> you need 50000*100 BYTES per second and that is about 50 Mbps,
>> > > >> so 3Mbps internet connection is not enough to keep up with such
>> > a
>> > > > stream.
>> > > >> (remember that connection speeds are expressed in BITS per
>> > second,
>> > > >> not bytes, and it takes 8 BITS to transfer one byte).
>> > > >>
>> > > >> Best regards,
>> > > >> Tomasz Janeczko
>> > > >> amibroker.com
>> > > >> ----- Original Message -----
>> > > >> From: "gsmservplus" <domantas.rudys@>
>> > > >> To: <amibroker@xxxxxxxxxxxxxxx>
>> > > >> Sent: Saturday, December 06, 2008 12:09 AM
>> > > >> Subject: [amibroker] Re: delays on iqfeed?
>> > > >>
>> > > >>
>> > > >> > could we expect any comments about this problem from Tomazs
>> > > > Janeczko?
>> > > >> > thanks
>> > > >> >
>> > > >> > --- In amibroker@xxxxxxxxxxxxxxx, "claudecaruana"
>> > > > <claudecaruana@>
>> > > >> > wrote:
>> > > >> >>
>> > > >> >> Hi,
>> > > >> >>
>> > > >> >> I too experienced the same 2 problems.
>> > > >> >>
>> > > >> >> As regards to the backfill problem, I resolved it by
>> > backfilling
>> > > >> >> through the AA window first, as opposed to manually pacing
>> > > > through
>> > > >> > the
>> > > >> >> symbols: I run a simple exploration with "wait for backfill"
>> > > >> > switched
>> > > >> >> on, on all quotations. Once this is done all quotes are
>> > updated
>> > > > and
>> > > >> >> streaming.
>> > > >> >>
>> > > >> >> I have not yet found a solution for the IQFeed delay. All I
>> > can
>> > > > say
>> > > >> > is
>> > > >> >> that it appears when there are a considerable number of
>> > streaming
>> > > >> >> symbols - if I have 5-10 symbols only which are streaming
>> > then
>> > > > the
>> > > >> >> data is fine, but if I run the backfill on all my database
>> > > > (approx
>> > > >> > 450
>> > > >> >> symbols) then I am also experiencing a huge delay.
>> > > >> >>
>> > > >> >> I do not think this delay is due to the connection speed - I
>> > am
>> > > >> >> currently putting it down to the processing speed of my PC
>> > and am
>> > > >> >> looking to upgrade, but I am not sure this will resolve the
>> > > > problem.
>> > > >> >>
>> > > >> >> I currently work around this by only subscribing to the
>> > symbols
>> > > > I
>> > > >> > will
>> > > >> >> be using for the day (by running the above routine I
>> > mentioned
>> > > > only
>> > > >> > on
>> > > >> >> a watchlist), then I update all the other symbols at the end
>> > of
>> > > > the
>> > > >> >> day in order to stay updated from a historical perspective.
>> > > >> >>
>> > > >> >> hope this helps. Let me know if you find out something else
>> > > > about
>> > > >> > the
>> > > >> >> IQFeed delay :)
>> > > >> >>
>> > > >> >> claude
>> > > >> >>
>> > > >> >>
>> > > >> >> --- In amibroker@xxxxxxxxxxxxxxx, "gsmservplus"
>> > <domantas.rudys@>
>> > > >> >> wrote:
>> > > >> >> >
>> > > >> >> > hello,
>> > > >> >> >
>> > > >> >> > AB 5.20,windows vista,iqfeed client 4.4.0.3,virgin uk
>> > > > broadband
>> > > >> >> > internet provider with up to 3 Mb speed.
>> > > >> >> >
>> > > >> >> > my problem is: when i load my iqfeed data base after some
>> > time
>> > > > i
>> > > >> > get
>> > > >> >> > time delays on my stocks, forex ant futures RT data compare
>> > > > with
>> > > >> > my
>> > > >> >> > PC time.every time delays are different from couple secs to
>> > > > over
>> > > >> > the
>> > > >> >> > minute.as longer i`ve got AB and IQfeed opened as bigger
>> > delay
>> > > >> > is.but
>> > > >> >> > it happens not always,but very often.IQfeed said is
>> > everything
>> > > >> >> > alright with my data and could be problem with software or
>> > ISP.
>> > > >> >> > p.s. time difference between IB TWS and my PC time is only
>> > > > couple
>> > > >> > (1-3
>> > > >> >> > sec.)seconds and never changes.
>> > > >> >> >
>> > > >> >> >
>> > > >> >> > another problem is: when i start AB and start go through my
>> > > >> > tickers
>> > > >> >> > to backfill current day data(as i understand it can
>> > backfill
>> > > > only
>> > > >> > 5
>> > > >> >> > tickers at the time, so every time when i start AB i`ve got
>> > to
>> > > > go
>> > > >> >> > through all my database,i have around 200 tickers database)
>> > > >> > sometimes
>> > > >> >> > some tiskers gives wrong data, i mean, only one very long
>> > > > candle
>> > > >> > for
>> > > >> >> > current with huge volume in hourly chart.after i
>> > start "force
>> > > >> >> > backfill"for those wrong ticker it gives right data
>> > then.and
>> > > >> > again it
>> > > >> >> > happens not always, but very often. and IQ feed
>> > cust.service
>> > > >> > told me
>> > > >> >> > could be problem with AB.
>> > > >> >> >
>> > > >> >> > any ideas about those two problems? thanks
>> > > >> >> >
>> > > >> >>
>> > > >> >
>> > > >> >
>> > > >> >
>> > > >> > ------------------------------------
>> > > >> >
>> > > >> > **** 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
>> > > >> >
>> > > >> >
>> > > >> >
>> > > >>
>> > > >
>> > > >
>> > > >
>> > > > ------------------------------------
>> > > >
>> > > > **** 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
>> > > >
>> > > >
>> > > >
>> > >
>> >
>>
>
>
>
> ------------------------------------
>
> **** 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
>
>
>
------------------------------------
**** 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
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