IB demo data quality

It absolutely useless... Delayed AND innaccurate. You need the paper trader account and data. Its identical to live data...Unfortunately you need an account to access it.
 
use search on IB site-

Live Trader Workstation Demos

The Trader Workstation (TWS) is our full-featured java-based trading and order entry application. The TWS demo mirrors the actual TWS in both form and function except market data is simulated based on the previous week's ticks and orders are not actually executed and cleared. However, TWS functionality will be identical to the actual application.

The IB TWS demo is available from 00:20 - 23:50, seven days a week. If you experience technical difficulties with the demo system please email tac@interactivebrokers.com.

If you are using a dial-up connection to the Internet, we suggest you install TWS directly onto your computer by clicking here. This will allow you to connect to both the demo and production TWS systems more quickly on future visits to the site.

Please choose one of our TWS demos below. Our single users Individual Demo and our Multi-user Advisor Demo (1 master and 2 client accounts) utilize Reg T Margin calculations. Our Portfolio Margin demo utilizes value at risk based margin calculations for US stocks, stock options, index options and single stock futures. Portfolio Margin accounts are available for customers with over USD 100,000 (or USD equivalent) in their account.
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http://individuals.interactivebrokers.com/en/p.php?f=tws&p=d&ib_entity=llc

also read about paper trading account
 
Quote from Big Game Hunter:

It absolutely useless...
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Worse than useless. Market orders fills can be 100 ticks away from the last trade during RTH. Not useful at all.
 
Quote from Big Game Hunter:

It absolutely useless... Delayed AND innaccurate. You need the paper trader account and data. Its identical to live data...Unfortunately you need an account to access it.
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how expect it to be accurate, if you, for example, testing application for US stocks @ 3 AM ET? :)
 
Thanks for all the replies -- is there any way to get an accurate delayed feed out of IB for papertrading and API testing? (Without opening an account and locking down $10,000, of course.)
 
Quote from bigdavediode:

Thanks for all the replies -- is there any way to get an accurate delayed feed out of IB for papertrading and API testing? (Without opening an account and locking down $10,000, of course.)
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don't think so. but why you stuck on IB?
if delayed feed is fine for you, and since you mention API, i assume you are familiar with programming-there some other choices. pick IQ feed for example,write your own application based on their delayed data(cost you about $20 a month) and use it for paper trading.

just an idea...

or you can try to find someone,who will give you access to their paper account :) imo-it will not compromise real account security.
 
Quote from bigdavediode:
is there any way to get an accurate delayed feed out of IB for papertrading and API testing? (Without opening an account and locking down $10,000)
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I don't believe IB has any delayed feed. IB's feed is a data-sliced/regenerated real-time feed. The feeds for the paper account and the actual account are both produced using the same data gotten from the exchanges and ECNs. However, they may or may not match depending on the rate of change of the data being sent from the exchanges\ECNs and what time slice you get. There are many threads here on ET about IB's datafeed, its advantages and disadvantages

You need $10K to open an account, you do not need $10K to keep the account open. However, there are fees if you do not produce $30 in commissions each month.

Jack
 
You need $10K to open an account, you do not need $10K to keep the account open. However, there are fees if you do not produce $30 in commissions each month.
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on top of that, to get complete L1 data for equities-you have to subscribe for ARCA data. without it-your NBBO will be different sometimes from actual NBBO.
 
Thanks for the replies --

Bob -- "if delayed feed is fine for you, and since you mention API, i assume you are familiar with programming-there some other choices. pick IQ feed for example,write your own application based on their delayed data(cost you about $20 a month) and use it for paper trading.
"

I'm intrigued with IQfeed, but their website is rather cryptic -- they say they support COM objects, am I to assume that they have an activex control?

IB is mindless and easy in that it's a simple DDE link to get delayed data into Excel -- is there something trivial like that for IQ feed?

On their website they list their price at $50 a month, rather than $20 -- is this a discounted, delayed price? Is it only real-time that's $50?

IB's making a mistake by doing this as I'm now going to recode away from them (since it's paper trading this particular system, I might just scrape Yahoo for delayed quotes.)

IB should want to have as many people tying their automated trading systems to their TWS, since there's a unwillingness to recode, they lock down their customers. Well, not now they don't, they force me to recode and wander off to a different broker/data supplier.

IB should only delay their quotes, there's no reason for them to corrupt the data and push away those of us who set up automated trading systems.

Just found a little PHP script to scrape Yahoo -- should anyone want it: http://www.phpbuilder.com/snippet/detail.php?type=snippet&id=163

Thanks again
 
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