DTN IQFeed, DTN.IQ, DTN ProphetX Support Forums

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 had always used ******* but for the past 2 weeks have been trying DTN IQFeed. Customer support has been extraordinary. They call just to make sure your problem hasn't recurred." - Comment from Public Forum

"I just wanted to tell you what a fine job you have been doing. While *******, from what I hear, has been down and out, off and on, IQ feed has held like a champ this week." - Comment from Shirin

"I just wanted to let you know how fast and easy I found it to integrate IQFeed into our existing Java code using your JNI client. In my experience, such things almost never go so smoothly - great job!" - Comment from Nate

"You have an excellent product !!!!!!" - Comment from Arely

"I was on the phone with a friend who uses CQG and right after the Fed announcement, CQG was as much as 30 seconds behind DTN.IQ. Some quotes were off by as much as 15-18 cents. Your feed never missed a beat." - Comment from Roger

"Boy, probably spent a thousand hours trying to get ******* API to work right. And now two hours to have something running with IQFeed. Hmmm, guess I was pretty stupid to fight rather than switch all this time. And have gotten more customer service from you guys already than total from them… in five years." - Comment from Jim

"IQFeed version 4 is a real screamer compared to anything else I have seen." - Comment from Tom

"IQ feed is brilliant. The support is mind-bending. What service!" - Comment from Public Forum Post

"I will tell others who want to go into trading that DTN ProphetX is an invaluable tool, I don't think anyone can trade without it..." - Comment from Luther

"I ran your IQFeed DDE vs. my broker vs. a level II window for some slow-moving options. I would see the level II quote change, then your feed update instantaneously. My broker's DDE, however, would take as much as 30 seconds to update. I am not chasing milliseconds, but half a minute is unacceptable." - Comment from Rob

Home

Recent Posts

Information on DTN's Industries:
DTN Oil & Gas | DTN Trading | DTN Agriculture | DTN Weather

DTN.IQ/IQFeed on Twitter
DTN News and Analysis on Twitter

»Forums Index »NEW IQFEED FORUMS »IQFeed API Questions »Option Chain Response missing "LC"

Author	Topic: Option Chain Response missing "LC" (3 messages, Page 1 of 1)
Roberts -Interested User- Posts: 53 Joined: Mar 26, 2008	Posted: May 23, 2023 06:17 AM Msg. 1 of 3 The doc here: http://www.iqfeed.net/dev/api/docs/OptionChainsviaTCPIP.cfm indicates that the response to any of the requests for option chains will have "a field containing the letters LC". We expect to see LC as the first field unless a RequestID is specified, and in that case LC would be the second token. Nonetheless in response to the request, LC is nowhere to be found in the response. CEO,CSCO,pc,FGHJKMNQUVXZ,,,,,4,1 Response... 6,CSCO2302F30,CSCO2302F35,CSCO2302F36,CSCO2302F37,CSCO2302F38,... I don't care if LC is there or not, but I just want to know that it will never be there. Will it?
DTN_Gary_Stephen -DTN Guru- Posts: 396 Joined: Jul 3, 2019	Posted: Jul 19, 2023 03:31 PM Msg. 2 of 3 It depends on the protocol you are setting. The LC in the message is new in protocol 6.2 and the older protocols do not have this in the message. It sounds like you're using an older protocol (anything before 6.2), in which case you will never get the LC, as long as you continue to use that protocol. There's no other difference between protocol 6.1 and 6.2 as far as option chains go. So if you'd rather not have the LC, just set protocol to 6.1 and it will not appear. Sincerely, Gary Stephen DTN IQFeed Implementation Support Specialist
Roberts -Interested User- Posts: 53 Joined: Mar 26, 2008	Posted: Jul 20, 2023 03:29 AM Msg. 3 of 3 Thanks for the clarification. Indeed, I'm using 6.1 so I'll have to keep this in mind for the next upgrade. Thanks again.