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Thanks TJ for the trick, It works out pretty well. It definitely reduce the load without streaming 100 tickers.
On Mon, Sep 21, 2009 at 9:29 AM, Tomasz Janeczko <groups@xxxxxxxxxxxxx> wrote:
Note that exceeding symbol limit leads to performance
degradation and possibly other problems.
----- Original Message -----
Sent: Monday, September 21, 2009 3:21
PM
Subject: Re: Re[2]: [amibroker] Is "price
on demand only" possible in Amibroker?
TJ:
Thanks
for the trick. I am trying it out now.
I need generally quotes for 100-110
tickers, but I can afford some delay upto a couple minutes.
-
Mark
On Mon, Sep 21, 2009 at 6:25 AM, Tomasz Janeczko <groups@xxxxxxxxxxxxx>
wrote:
Hello,
Real-time data are generally delivered on demand.
Getting data needs subscription to given symbol, only
then you can get current price.
If you call GetRTDataForeign for more than 100 symbols
in IB (their limit) it will
subscribe new / unsubscribe old but this is not
"immediate" as it takes time (upto few seconds)
for IB/TWS to process subscription/unsubscription
request for given symbol.
If you don't want backfills to be triggered
automatically, simply
uncheck "Automatic backfill on first data access"
check box in the File->Database Settings->Configure
as described here:
-----
Original Message -----
Sent:
Monday, September 21, 2009 11:32 AM
Subject:
Re[2]: [amibroker] Is "price on demand only" possible in Amibroker?
No Mark, I have no solution. afaik, Backfill cannot be
disabled.
herman
Monday, September 21, 2009, 12:57:06 AM, you wrote:
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Herman:
This is an old post but I do have exactly the same
question.
I don't need streaming and backfills, just the open prices
by getRTDataForeign() from IB data plugin.
Have you figured it out? or heard anything from TJ
himself?
Thanks,
- Mark
On Wed, Jan 21, 2009 at 11:30 AM, Herman <psytek@xxxxxxxx> wrote:
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For better real-time execution speed and to eliminate
IB backfill problems (IB lock-out and DB-corruption), I want
to work without any historical data, arrays, or
backfill.
I just want to be able to get a, using
getRTDataForeign(), a specific price when I need it. For
efficiency prices may be "sampled" at different rates
depending on my system needs.
1) Is it possible to limit data collection through
the IB data plug-in to getRTData() functions ONLY?
2) Would I even need a database for such a
setup?
Is this possible?
thanks,
herman
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