Join the 80,000 other DTN customers who enjoy the fastest, most reliable data available. There is no better value than DTN!

(Move your cursor to this area to pause scrolling)

"I have been using IQFeed now for a few years in MultiCharts and I have zero complaints. Very, very rare to have any data hiccups or anything at all go wrong." - Comment from Public Forum
"If you want customer service that answers the phone, your best bet is IQFeed. I cannot stop praising them or their technical support. They are always there for you, and they are quick. I have used ****** too but the best value is IQFeed." - Comment from Public Forum
"I am keeping IQFeed, much better reliabilty than *******. I may refer a few other people in the office to switch as well." - Comment from Don
"I am very pleased with the DTNIQ system for quotes and news." - Comment from Larry
"As a past ******* customer(and not a happy one), IQ Feed by DTN is a much better and cheaper product with great customer support. I have had no problems at all since switching over." - Comment from Public Forum
"Thanks for the great product and support. During this week of high volume trading, my QuoteTracker + IQ Feed setup never missed a beat. Also, thanks for your swiftness in responding to data issues. I was on ******* for a few years before I made the switch over early this year, and wish I had done it a long time ago." - Comment from Ken
"Previously I was using *******. IQFeed is WAY more economical, and for my charting needs is just as good, if not better." - Comment from Public Forum Post
"IQ feed is brilliant. The support is mind-bending. What service!" - Comment from Public Forum Post
"I am very happy I changed. I love the product, but more so I am thrilled with Tech Support. You are knowledgeable, polite, pleasant and professional." - Comment from Pat
"You have an excellent product !!!!!!" - Comment from Arely
Home  Search  Register  Login  Blogs Recent Posts

Information on DTN's Industries:
DTN Oil & Gas | DTN Trading | DTN Agriculture | DTN Weather
Follow DTN_IQFeed on Twitter
DTN.IQ/IQFeed on Twitter
DTN News and Analysis on Twitter
Viewing User Profile for: lufeng
About Contact
Joined: May 16, 2017 02:45 PM
Last Post: May 17, 2017 08:51 PM
Last Visit: May 17, 2017 09:31 PM
Yahoo IM:
Post Statistics
lufeng has contributed to 7 posts out of 18545 total posts (0.04%) in 402 days (0.02 posts per day).

20 Most recent posts:
Data and Content Support » minute bars from tick data May 17, 2017 08:51 PM (Total replies: 9)

Is there a way to erase a post (for example, asking a question but realize the answer right away)?
Edited by lufeng on May 17, 2017 at 09:06 PM

Data and Content Support » minute bars from tick data May 17, 2017 08:47 PM (Total replies: 9)

Thanks Tim. That's very helpful.
Edited by lufeng on May 17, 2017 at 09:03 PM

Data and Content Support » minute bars from tick data May 17, 2017 09:06 AM (Total replies: 9)

Thanks, Tim.

1) Do you happen to have the same document for the NYSE (and other exchanges)?

2) Within that matrix, there are two columns for "Update Last": Consolidated Processing vs Market Center. Which column is used to define "last qualified" for the purpose of constructing a DTN minute bar?


Data and Content Support » Delisted Stocks May 17, 2017 09:05 AM (Total replies: 7)

Thanks, Mark and Tim. It is clear.

Data and Content Support » minute bars from tick data May 16, 2017 07:55 PM (Total replies: 9)

It seems that the minute bars constructed by DTN precisely consist of 1) all last-qualifying trades, and 2) all formT trades. Is this correct?

Is there a list of all trade condition codes that are "last qualifying"?


Data and Content Support » Delisted Stocks May 16, 2017 03:29 PM (Total replies: 7)

Thx Stephen, for your quick response.

Sorry that I was not clear. I can see that UA.C would still be in your system w/ stored historical data (because that ticker has not been reused). My question is actually "is there a way I would know, from your data alone, that today's UA and the previous UA.C are actually the same stock"?

A more extreme example: Is there a way I would know that today's "C" was once "CCI" (and "TRV" even earlier)?

This is more of a symbology issue than historical price availability issue.

Data and Content Support » Delisted Stocks May 16, 2017 03:17 PM (Total replies: 7)

A related question:

If a stock went thru ticker change, e.g. UA.C --> UA, would the old ticker info (UA.C) be kept anywhere?

Lu Feng

Time: Thu June 21, 2018 7:28 AM CFBB v1.2.0 16 ms.
© AderSoftware 2002-2003