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»Forums Index »Archive (2017 and earlier) »IQFeed Developer Support »What to do if big chunk of data is missing? How to find out it's missing?

Author	Topic: What to do if big chunk of data is missing? How to find out it's missing? (3 messages, Page 1 of 1)
iliachinkarev -Interested User- Posts: 2 Joined: Jan 21, 2015	Posted: Jan 21, 2015 08:12 PM Msg. 1 of 3 Let's say I pulled some 1 minute historical data for Google (GOOG) over the Lookup port. Also let's say that data is missing. Huge chunk of data is missing. It goes all the way to 2014-03-27 09:31:00,568.0000,568.0000,568.0000,568.0000,322,300, and ends right there. Google didn't exist before that date according to the IQFeed. Well, good thing that I know for sure that Google existed before. With the same symbol. (at least back to 2007, so 6 or 7 more years). My first question: what I do now? How do I get this historical data? My next question: how to find out that some data is missing? (programmatically, within the code, as opposed to manual data check) Thank you in advance.
iliachinkarev -Interested User- Posts: 2 Joined: Jan 21, 2015	Posted: Jan 21, 2015 10:14 PM Msg. 2 of 3 Also, DELL doesn't have recent historical data. First data I see is the 2013-10-29 (there is a gap between this date and today)
DTN_Tim Walter -DTN Guru- Posts: 1238 Joined: Apr 25, 2006	Posted: Jan 22, 2015 02:36 AM Msg. 3 of 3 Hello, I can double check these in the morning, but I believe Dell did a large buyback that resulted in the company going private again. And as for Google, they moved what was formerly the GOOG symbol to the new symbol GOOGL. The data currently on GOOG represents a new contract they issued the same day. One being class A shares, the other being Class C, I think. So the data for what was GOOG was moved to GOOGL at that time, and I think you can find that longer term history you need there. Let me know though if you have any questions, Tim