|
PureBytes Links
Trading Reference Links
|
Dennis,
BTW re your charts not updating - you think your afl has stalled.
Next time open your quote editor ... are the quotes there ahead of
your chart time or are they both at the same time (delayed)? If
delayed, we are both speaking of the same problem (with different
data vendors, internet providers, vista vs xp, coding, db time
intervals, symbols-markets) - although your problem is occassional
and mine regular. Perhaps you could notice the duration AB was
running when problem occurs and if the time of day is a 'busy' market
time.
Dan
--- In amibroker@xxxxxxxxxxxxxxx, Dennis Brown <see3d@xxx> wrote:
>
> Dan, my comments are embedded:
>
> On Jun 27, 2008, at 10:23 PM, monitorit wrote:
>
> > Hi Dennis,
> > Perhaps you can help me - you'd be the first on this problem :(
> > The problem I described is ~daily.
>
> I will do my best..
>
> > MY AB workspace displays the quotes window, 1-2 t&s windows + 5
> > symbol-linked chart windows (1 min, 2 min, 5 min, 15 min and
daily).
> > Each chart window has 8 sheets - but all these are empty except
the
> > first sheet with 1-3 panes each and 1 window has a study on the
> > second sheet. Total time (sum) for the 5 charts via 'display
chart
> > timing' is ~400 msec. Running through these charts afterhours is
no
> > problem (local db is enabled).. I see all charts windows
completed in
> > about 4 seconds after changing symbols.
>
> My charts are as simple as I can make them. Just one Main chart
which
> run everything. Can run as fast as 200ms to as slow as 10s
depending
> on the trading parameters I am using and the amount of history and
> especially the number of bars I am displaying. I might have
another
> simple chart running in another tab just to keep another symbol
> database up to date.
>
> > What do you think are the best settings for the pref>data
> > tab 'default db settings' in-memory cache size (max symbols),
(max
> > megabytes) and number of bars to load... for a 7400 bar, 100
symbol
> > db (and perhaps for a longer db with more symbols). What do these
> > fields actually mean/do?
>
> Good questions, wish I knew all those answers. My settings:
>
> I only run about a dozen symbols.
> I keep 300,000 5 second bar database
> Cache max 82 MB.
> I load up to 100,000 bars, but only about 3,000 1 minule bars when
> trading.
>
> > I have 4GB (3 GB available in vista32) and
> > no other programs running... so is it best to use >1000 megabytes?
>
> I have a 2GB virtual XP32 running only AB. I use all default
settings.
>
> > What is number of bars to load (does db setting overwrite this?)?
>
> I override this in my AFL with SetBarsRequired()
>
> > DB settings has a 'flush cache' button. Doesn't seem to do
anything
> > for me. Does it work for you?
>
> It would just reload it again if it were flushed.
>
> > Refresh and refresh all has no
> > effect. If I do a refresh current sym, I get new data for that
sym
> > but then no further updates for any symbol.
>
> Refresh just forces AFL to run one cycle on the chart.
>
> I use RequestTimedRefresh() to make my chart refresh all the time
even
> if not quotes are coming in.
>
> > My db is 7400 1min bars*100 sym... are you working with a similar
> > size?
>
> Like I said, 300,000 5 second bars for just a few symbols.
>
> > BTW, I know what you mean about getting hypnotized so I get
alerted
> > to the quote delay with the following in the 1min chart - you can
> > probably get it to work with shorter periods or make it say
something:
> >
> > delayedcolor=IIf(TimeNum()<Now(4)-120 OR DateNum()<Now(3),32,16);
> > //for time at bar start-- 32=colorred, 16=colorblack , red if
> > last bar start-time is earlier than 1min20 sec of system time
> > //my bar times are at start of interval so min# could be 101
> >
> > Plot( C, "Close", delayedcolor, styleNoTitle | ParamStyle
("Style") |
> > GetPriceStyle() );
>
> Assuming that it is not the AFL that is stalled, I could write
> something that would monitor how long since the last quote came
in.
> However, in my case, I suspect that the AFL may not be running any
> passes when my charts freeze.
>
> OTOH, I could have another chart running in another tab which just
> pings messages to the main chart through a static variable to make
> sure it is alive, and alert me if it has stalled. Thanks for
jogging
> that Idea.
>
> Best regards,
> Dennis
>
>
> > Thanks, Dan
> >
> > --- In amibroker@xxxxxxxxxxxxxxx, Dennis Brown <see3d@> wrote:
> >>
> >> Hello,
> >>
> >> I have something that happens once every few days with my RT
charts.
> >>
> >> At some point in the day, the chart stops updating. I also have
> >> getRTData() functions in my AFL that also stop.
> >>
> >> I don't know if it is the data feed that stops handing the quotes
> > to
> >> AB, or if XP is not giving the data, or if the AFL loop stops
> >> running. Everything looks normal, but I notice that my broker's
> >> charts have moved ahead and my AB charts have stalled (My
broker's
> >> charts are prone to stalling in fast markets and my AB charts
keep
> > on
> >> ticking). This can be disconcerting when you are in a fast trade
> > and
> >> you go blind without realizing it.
> >>
> >> I am using DTN IQFeed, but the same thing happened with eSignal
in
> >> previous years. The data feed plug-in indicates everything is
> > green
> >> and working.
> >>
> >> Clicking on the chart refresh button starts the chart running
again.
> >>
> >> I am usually in a panic when this happens, so I have not been
able
> > to
> >> properly go through debug steps to isolate the problem area.
> >>
> >> So my questions are:
> >>
> >> 1. Does anyone know the root cause of this?
> >> 2. Is there a way to detect that the chart has stopped updating
> >> (other than by eye)?
> >> 3. Is there a way to automatically jump start the updating again
> > when
> >> it happens?
> >>
> >> Thanks for any insights.
> >>
> >> If nobody can help, I will ask support.
> >>
> >> Best regards,
> >> Dennis
> >>
> >
> >
> >
> > ------------------------------------
> >
> > Please note that this group is for discussion between users only.
> >
> > To get 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
> >
> >
> >
>
------------------------------------
Please note that this group is for discussion between users only.
To get 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
<*> To visit your group on the web, go to:
http://groups.yahoo.com/group/amibroker/
<*> Your email settings:
Individual Email | Traditional
<*> To change settings online go to:
http://groups.yahoo.com/group/amibroker/join
(Yahoo! ID required)
<*> To change settings via email:
mailto:amibroker-digest@xxxxxxxxxxxxxxx
mailto:amibroker-fullfeatured@xxxxxxxxxxxxxxx
<*> To unsubscribe from this group, send an email to:
amibroker-unsubscribe@xxxxxxxxxxxxxxx
<*> Your use of Yahoo! Groups is subject to:
http://docs.yahoo.com/info/terms/
|