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DTN IQFeed's Dave Forss (Business Development Manager) - Ask Me Anything (AMA)
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DTN IQFeed's Dave Forss (Business Development Manager) - Ask Me Anything (AMA)

  #21 (permalink)
Site Administrator
Manta, Ecuador
 
Futures Experience: Advanced
Platform: My own custom solution
Favorite Futures: E-mini ES S&P 500
 
Big Mike's Avatar
 
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PositiveDeviant View Post
Why are they different?

Discussed in great detail here:
https://futures.io/elite-circle/3873-analysis-comparison-different-data-feeds-platforms-bid-ask-studies.html

You can also see here some info:
https://futures.io/brokers-data-feeds/22585-unfiltered-data.html

My experience is simple: Zen Fire is a latency-sensitive execution feed for brokers where speed is paramount. IQFeed is instead focused on accuracy and offers a lot more in terms of data feed services than any execution feed is capable of.

I've seen trades (last) come across the wire on a ZF feed that were above the offer or below the bid. That means they were out of order. I've never seen that with IQFeed.

Both services are good depending on what you are trying to do with them.

We'll see if Robert is able to offer more of a technical answer as to how IQFeed assures ticks are delivered in order and etc.

Mike

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  #22 (permalink)
Site Administrator
Manta, Ecuador
 
Futures Experience: Advanced
Platform: My own custom solution
Favorite Futures: E-mini ES S&P 500
 
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Posts: 46,237 since Jun 2009
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PositiveDeviant View Post
I'm on a 30 day trial with DTN IQ Feed, using it with Multicharts, and so far I'm impressed.

BTW, you might want to try duplicating your results on another platform that has been around a while. It's my understand that MC has only very recently added such tools, so you would want to verify their accuracy against known-good platforms.

The nice thing about IQFeed is also that you can power multiple platforms concurrently with it with a single instance of the service running on your computer.

Mike

Due to time constraints, please do not PM me if your question can be resolved or answered on the forum.

Need help?
1) Stop changing things. No new indicators, charts, or methods. Be consistent with what is in front of you first.
2) Start a journal and post to it daily with the trades you made to show your strengths and weaknesses.
3) Set goals for yourself to reach daily. Make them about how you trade, not how much money you make.
4) Accept responsibility for your actions. Stop looking elsewhere to explain away poor performance.
5) Where to start as a trader? Watch this webinar and read this thread for hundreds of questions and answers.
6)
Help using the forum? Watch this video to learn general tips on using the site.

If you want
to support our community, become an Elite Member.

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  #23 (permalink)
 Vendor: www.iqfeed.net 
Omaha NE
 
Futures Experience: Intermediate
Platform: IQFeed compatible
Favorite Futures: ES
 
Robert Carrillo's Avatar
 
Posts: 271 since Jun 2012
Thanks: 234 given, 374 received



PositiveDeviant View Post
I'm on a 30 day trial with DTN IQ Feed, using it with Multicharts, and so far I'm impressed.

...now I see that on some days there is a very marked difference between what Zen-Fire is telling me is happening and what DTN IQ Feed tells me is happening. My instinct tells me I think I know which one is correct but I have no evidence for this.

Why are they different?

Hi PositiveDeviant,

It comes down to the delivery protocol used to provide the data. ZF and other broker data use UDP send data out, a protocol in which delivery of data packets isn't guaranteed, in order to emphasis speed. IQFeed uses TCP, which does guarantee delivery at the cost of some latency. That's why comparisons like yours show broker data with fewer ticks and lower volume than IQFeed, and not the other way around.

Robert

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  #24 (permalink)
Site Administrator
Manta, Ecuador
 
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Robert,

I recently upgraded my IQFeed client to 4.9.0.3. Is it my imagination, or are historical downloads of large amounts of data significantly faster now? I had to do a double take when I was downloading 120 days of tick data for a bunch of instruments, it seemed to be orders of magnitude faster when I was using QCollector.

Mike

Due to time constraints, please do not PM me if your question can be resolved or answered on the forum.

Need help?
1) Stop changing things. No new indicators, charts, or methods. Be consistent with what is in front of you first.
2) Start a journal and post to it daily with the trades you made to show your strengths and weaknesses.
3) Set goals for yourself to reach daily. Make them about how you trade, not how much money you make.
4) Accept responsibility for your actions. Stop looking elsewhere to explain away poor performance.
5) Where to start as a trader? Watch this webinar and read this thread for hundreds of questions and answers.
6)
Help using the forum? Watch this video to learn general tips on using the site.

If you want
to support our community, become an Elite Member.

Reply With Quote
The following 4 users say Thank You to Big Mike for this post:
 
  #25 (permalink)
Site Administrator
Manta, Ecuador
 
Futures Experience: Advanced
Platform: My own custom solution
Favorite Futures: E-mini ES S&P 500
 
Big Mike's Avatar
 
Posts: 46,237 since Jun 2009
Thanks: 29,349 given, 83,139 received

Robert,

I've heard that NASD members have access to "Level III" data. Does this mean that these member firms can see the entire order book, and not just 10 levels of depth like us mere mortals?

Is there any other way for us retail guys to get this advantage?

Mike

Due to time constraints, please do not PM me if your question can be resolved or answered on the forum.

Need help?
1) Stop changing things. No new indicators, charts, or methods. Be consistent with what is in front of you first.
2) Start a journal and post to it daily with the trades you made to show your strengths and weaknesses.
3) Set goals for yourself to reach daily. Make them about how you trade, not how much money you make.
4) Accept responsibility for your actions. Stop looking elsewhere to explain away poor performance.
5) Where to start as a trader? Watch this webinar and read this thread for hundreds of questions and answers.
6)
Help using the forum? Watch this video to learn general tips on using the site.

If you want
to support our community, become an Elite Member.

Reply With Quote
The following user says Thank You to Big Mike for this post:
 
  #26 (permalink)
Site Administrator
Manta, Ecuador
 
Futures Experience: Advanced
Platform: My own custom solution
Favorite Futures: E-mini ES S&P 500
 
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Posts: 46,237 since Jun 2009
Thanks: 29,349 given, 83,139 received

Robert,

Regarding dark liquidity pools -- in the case where firms are legally required to publicly disclose trade information, they tend to do so at the maximum interval legally allowed.

Can you give me an example of how such a transaction would come across the tape? Is it marked somehow to specify the trade did not occur in real time? Is it timestamped in the past, or is it timestamped at the time the trade is reported even though the trade occurred in the past?

Does this practice occur only in equities, or is it "legal" in the futures market (ie: CME)?

Mike

Due to time constraints, please do not PM me if your question can be resolved or answered on the forum.

Need help?
1) Stop changing things. No new indicators, charts, or methods. Be consistent with what is in front of you first.
2) Start a journal and post to it daily with the trades you made to show your strengths and weaknesses.
3) Set goals for yourself to reach daily. Make them about how you trade, not how much money you make.
4) Accept responsibility for your actions. Stop looking elsewhere to explain away poor performance.
5) Where to start as a trader? Watch this webinar and read this thread for hundreds of questions and answers.
6)
Help using the forum? Watch this video to learn general tips on using the site.

If you want
to support our community, become an Elite Member.

Reply With Quote
The following 2 users say Thank You to Big Mike for this post:
 
  #27 (permalink)
 Vendor: www.iqfeed.net 
Omaha NE
 
Futures Experience: Intermediate
Platform: IQFeed compatible
Favorite Futures: ES
 
Robert Carrillo's Avatar
 
Posts: 271 since Jun 2012
Thanks: 234 given, 374 received


Big Mike View Post
Robert,

I recently upgraded my IQFeed client to 4.9.0.3. Is it my imagination, or are historical downloads of large amounts of data significantly faster now? I had to do a double take when I was downloading 120 days of tick data for a bunch of instruments, it seemed to be orders of magnitude faster when I was using QCollector.

Mike

Hi Mike,

We did tweak the compression of the data in 4.9.0.3, so it likely does appear faster. Results will vary depending on individual setups, ISP, etc.

Thanks.

Robert

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  #28 (permalink)
 Vendor: www.iqfeed.net 
Omaha NE
 
Futures Experience: Intermediate
Platform: IQFeed compatible
Favorite Futures: ES
 
Robert Carrillo's Avatar
 
Posts: 271 since Jun 2012
Thanks: 234 given, 374 received


Big Mike View Post
Robert,

I've heard that NASD members have access to "Level III" data. Does this mean that these member firms can see the entire order book, and not just 10 levels of depth like us mere mortals?

Level 3 is for market makers to enter orders to the NASDAQ matching engine.


Quoting 
Is there any other way for us retail guys to get this advantage?

No, a retail trader would need to become a registered market maker and post collateral for trading and make a market in the securities, post a bid and ask at all times during market hours.

Thanks.

Robert

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  #29 (permalink)
 Vendor: www.iqfeed.net 
Omaha NE
 
Futures Experience: Intermediate
Platform: IQFeed compatible
Favorite Futures: ES
 
Robert Carrillo's Avatar
 
Posts: 271 since Jun 2012
Thanks: 234 given, 374 received


Big Mike View Post
Robert,

Regarding dark liquidity pools -- in the case where firms are legally required to publicly disclose trade information, they tend to do so at the maximum interval legally allowed.

Trade Reporting Frequently Asked Questions - FINRA


Quoting 
Can you give me an example of how such a transaction would come across the tape? Is it marked somehow to specify the trade did not occur in real time? Is it timestamped in the past, or is it timestamped at the time the trade is reported even though the trade occurred in the past?

The trade is generally reported through NASDAQ or NYSE Trade Reporting facility NTRF, the timestamp is when the trade occurred not when it was reported.


Quoting 
Does this practice occur only in equities, or is it "legal" in the futures market (ie: CME)?

There are OTC swaps and forward transactions, but there are no dark pools for futures contracts as there are in the equity markets. The OTC transactions are not reported through a “Trade Reporting Facility” like the equities. For example ICE has several OTC contracts that they do not report in their ICE Impact data feed.

Thanks.

Robert

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  #30 (permalink)
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What additional information do marketmakers have with "Level III"?

Do you see the possibility to deliver access to data like the "stop orderbook" or infos at which prices who (marketmakers and institutions) are asking or offering size as "add-on" for your existing services? Or are those infos an industry secret?

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