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Ed,
No, eSignal API and the plugin therefore is ROCK SOLID and
handles backfilling simply without ANY SINGLE problem
( I use it EVERYDAY for my own trading ). What's more eSignal
backfill is at least 2 times FASTER than IQFeed
and allows partial day backfills (IQFeed only full days).
This is one of many reasons why eSignal is WAY superior. It
costs more but it is worth it.
And their data are essentially bad-tick free (if there is a
bad tick it usually gets fixed within minutes by their quality assurance
team).
eSignal also has decent API and handles all disconnections and
reconnections fully AUTOMATICALLY and you can
just unplug from the net (physically) and then re-plug and it
will automatically recover. IQFeed can not do that.
eSignal allows multiple applications without single problem.
IQFeed does not allow that and I have to made HUGE workarounds to bugs in IQFeed
API
to make it possible.
eSignal Data manager NEVER hanged on my machine. IQConnect
hangs periodically.
You look at things from user point of view and look only at
cost (which I partially understand) but
if you look from the inside (if you see both APIs) you will
see huge abyss between two in terms how both APIs are coded.
Best regards,Tomasz
Janeczkoamibroker.com
<BLOCKQUOTE dir=ltr
>
----- Original Message -----
<DIV
>From:
ed
To: <A title=amibroker@xxxxxxxxxxxxxxx
href="">amibroker@xxxxxxxxxxxxxxx
Sent: Tuesday, April 20, 2004 12:08
PM
Subject: Re: [amibroker] Re: IQFeed
plugin 1.5.0 works great!
"Another
point regarding the IQFeed plugin is that the backfill routinesappear to
have NO timeout. Sometimes it happens that an attemptedbackfill
"hangs" (waits) forever which doesn't get detected by theplugin.
According to the version history at<A
href=""><FONT face="Courier New"
size=3>http://www.amibroker.com/iqfeed.html,<FONT
face="Courier New" size=3> the backfill code is based onTCP/IP (=
sockets), so setting of the socket timeout value wouldpossibly
help."
This might explain why my scans always hang/stop at some arbitrary
symbol. Guess eSignal has the same problem? Maybe Tomasz could advise?
rgds, Ed
<BLOCKQUOTE
>
----- Original Message -----
<DIV
>From:
<A title=independent_opinion@xxxxxxx
href="">global_investor
To: <A title=amibroker@xxxxxxxxxxxxxxx
href="">amibroker@xxxxxxxxxxxxxxx
Sent: Tuesday, April 20, 2004 10:56
AM
Subject: [amibroker] Re: IQFeed plugin
1.5.0 works great!
--- In <A
href="">amibroker@xxxxxxxxxxxxxxx, "ed"
<ed2000nl@x...> wrote:> yes, I
confirm. > > I attached IVAC and CSCO 1-minute chart. CSCO
seems OK but IVAC isnot OK. Also if I plot QQQ's daily chart the spikes
are still in there. if you want to view daily charts, create a
database with base intervaldaily. This is important because daily
backfill data is notaggregated from tick data by the IQFeed servers (so
it cannot containbad ticks) whereas minute data is.However, the
situation might be different for daily bars not generatedby backfilling,
for example the last (rightmost) bar displayed in adaily
chart. I could imagine that this bar is formed by
tickaggregation conducted by Amibroker's IQFeed plugin, ie. the
pluginchanges the last bar when it receives a new tick. If this
assumptionis correct, it is of course possible that daily bars (not
generated bybackfilling) contain bad ticks.If so, a solution
would be to manually force a backfill in order tooverride the bars
collected by the IQFeed plugin. But I don't knowwhether this
can be done with Amibroker, would have to investigate that.Another
point regarding the IQFeed plugin is that the backfill routinesappear to
have NO timeout. Sometimes it happens that an attemptedbackfill
"hangs" (waits) forever which doesn't get detected by theplugin.
According to the version history at<A
href="">http://www.amibroker.com/iqfeed.html,
the backfill code is based onTCP/IP (= sockets), so setting of the
socket timeout value wouldpossibly help.As for the mentioned
(potential) bug (O=H=L=C when backfilling 1-mindata): I tried to
reproduce it by creating a new test database whichwas initially empty.
Interestingly, INTC and CSCO backfilled correctlywhile the described
behavior happened with compx.x, JDSU and CIEN, forexample.
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