hi Tomasz, that makes sense.
However in my case all my symbols are already active both on and off market hours. When quotes are being updated constantly during market hours, a test exploration code which displays the closing price takes approx. 6 - 10 times the duration of when the quotes are also streaming but outside of market hours (i.e. hardly any updates). My question is if there is anything I can do to speed this up. BR eToke --- In [email protected], "Tomasz Janeczko" <gro...@...> wrote: > > Hello, > > That depends if given symbol is in the "active" (i.e. streaming) list or not. > If it is - then turning on/off "wait for backfill" does not make difference. > > If it is not, then with "wait for backfill" turned on it will of course wait > for "missing" bars > before proceeding to next symbol. > > Charts on the other hand, always refresh immediatelly with data that are > present right now. > If symbol is not present in the active list it is automatically added and > backfill request > may be sent but this does not block chart from refreshing - it will refresh > immediatelly, > and once backfill data eventually arrives it will refresh once more. > In other words - charts are asynchronous with regards to backfill. AA can be > synchronous > ("wait for backfill" turned ON) or asynchronous ("wait for backfill" turned > OFF). > > That's the only difference. AFL execution IS IDENTICAL regardless where it > occurs. > Of course with different zoom levels / different AA range you may be using > different number of bars, > but that should be obvious. > > Best regards, > Tomasz Janeczko > amibroker.com > ----- Original Message ----- > From: "sidhartha70" <sidharth...@...> > To: <[email protected]> > Sent: Tuesday, August 04, 2009 5:14 PM > Subject: [amibroker] Re: Speeding exporation intraday > > > > I'd be interested to hear TJ's answer on this eToke... > > > > Because I was asking from very similar questions of support & TJ > > recently... namely that equivalent AFL on charts seems to execute > > much quicker than a scan or exploration. Which obviously leads one to think > > that other operations that occur in a scan or > > exploration, outside of the AFL execution, are what take the time... > > > > Why this time is greater with a streaming feed I don't know... > > > > --- In [email protected], "etoketrader" <etoke@> wrote: > >> > >> Hi, for testing I am currently running: > >> > >> n Last quotations = 1 > >> A very basic AFL code which lists closing price. > >> QuickAFL turned on > >> > >> I am concerned about the comparison between how it runs outside of market > >> hours vs how it runs during. > >> > >> BR, > >> eToke > >> > >> > >> > >> --- In [email protected], "sidhartha70" <sidhartha70@> wrote: > >> > > >> > How many quotations are you running the explorations over...? > >> > > >> > --- In [email protected], "etoketrader" <etoke@> wrote: > >> > > > >> > > Tried that. I always run the first backfill before market hours. After > >> > > that, backfill setting does not seem to make any > >> > > difference as long as everything has already been backfilled and all > >> > > symbols are streaming. > >> > > > >> > > BR > >> > > eToke > >> > > > >> > > > >> > > --- In [email protected], "murthysuresh" <murthysuresh@> wrote: > >> > > > > >> > > > backfill before the start of the market hours. turn off backfill as > >> > > > you only need to do it at the beginning of the session. > >> > > > > >> > > > --- In [email protected], "etoketrader" <etoke@> wrote: > >> > > > > > >> > > > > Hi, > >> > > > > > >> > > > > I currently run IQFeed on 500 symbols. Exploration outside of > >> > > > > market hours run under 1 minute but slow down to 6 minutes > >> > > > > during market hours. > >> > > > > > >> > > > > Can anybody recommend some ideal settings to speed up intraday > >> > > > > explorations while streaming? > >> > > > > > >> > > > > thanks, > >> > > > > eToke > >> > > > > > >> > > > > >> > > > >> > > >> > > > > > > > > > > ------------------------------------ > > > > **** 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 > > > > > > >
