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Lav2018 has contributed to 10 posts out of 21251 total posts (0.05%) in 2,395 days (0.00 posts per day).

20 Most recent posts:
IQFeed Developer Support » avoiding settlement "ticks" for futures Oct 31, 2018 03:26 PM (Total replies: 3)

Thanks, Steve.

Consider the following situation:
15:14:59 @ES# trades for 2500.00
15:15:02 @ES# settles for 2500.25
15:15:05 I start a trades-only watch on @ES# with command "t[@ES#]"

I will then immediately receive Summary Message at 15:15:05. In that Summary Message, what will the values of the following fields be:

Extended Trade
Last
Most Recent Trade
Message Contents

IQFeed Developer Support » avoiding settlement "ticks" for futures Oct 31, 2018 01:46 AM (Total replies: 3)

I have seen other data providers send out "ticks" that give the settlement price for the future contract each day at closing; these ticks have a volume of 0. I do not want these ticks.

I only want to follow ticks that represent actual trades taking place on the exchange. What's the best way to achieve this? Would it be the Extended Trade field?

On this same topic, in dealing with @ES# can you tell me the difference between the Extended Trade fields and Last fields? I understand their difference in terms of stocks, but not futures.

Data and Content Support » historical data files containing large gaps Oct 1, 2018 08:35 PM (Total replies: 4)

Sounds reasonable. I will let you know if I find others. Thanks.

Data and Content Support » historical data files containing large gaps Oct 1, 2018 09:13 AM (Total replies: 4)

Thanks.

Will it be possible for your team to identify other days and other contracts that have this same problem? I was only checking 25 symbols for 1 month. I think it is likely that this happens with other contracts and on other roll dates.

Data and Content Support » historical data files containing large gaps Sep 29, 2018 12:11 PM (Total replies: 4)

I am very happy with the live data that IQfeed provides, but the historical data appears to have major issues.

How are historical files maintained and checked for accuracy? I tried downloading 25 symbols (minute bars from September 3 to September 28), and 14 out of 25 files were missing the entire trading day of September 20. I can't say all other bars were present, but missing an entire day was obvious.

The symbols missing data were:
SMM#
STG#
STM#
STN#
STO#
@XAB#
@XAE#
@XAF#
@XAI#
@XAK#
@XAP#
@XAU#
@XAV#
@XAY#

I brought up the missing data for @XAE# to support staff, and they have since fixed it. However, the symbols SMM, STG, STM, STN, STO all remain incomplete.

Is there an easy explanation for the errors? I would like to think that I can rely on the data, but right now I feel responsible for finding gaps and reporting them to you. I am not in the best position to find gaps, and therefore worry that many others may exist in the data.

IQFeed Developer Support » chronological order of ticks received? Apr 19, 2018 04:34 AM (Total replies: 1)

Am I safe with the assumption that the messages I receive for one symbol will be in chronological order, or do I need to code for the possibility that an exchange or IQFEED may send a tick out of chronological order occasionally?

Particularly, if my requests are

S,SELECT UPDATE FIELDS,Symbol,Most Recent Trade,Most Recent Trade Time
t@ES#

Will Most Recent Trade always be the most recent? Or do I need to use CPU checking its timestamp against the previous tick's timestamp?

Data and Content Support » Can't Connect via iqconnect.exe Apr 19, 2018 12:04 AM (Total replies: 10)

I ran into this same problem. Found this thread in a search. I fixed my problem already, but for anyone just starting out with the API:

the example on http://www.iqfeed.net/dev/api/docs/docs52/InitializingTheFeed.cfm has small typo so can't copy/paste it into your code and replace with your parameters

IQConnect.exe ?product YOUR_PRODUCT_HERE?version 1.0.0.0 ?login 100000 ?password 1234 ?autoconnect

It is missing a space between YOUR_PRODUCT_HERE and -version. Once I fixed that it works.

IQFeed Developer Support » C# sample program for Leve1Socket Apr 5, 2018 02:51 PM (Total replies: 5)

Makes sense. Thanks.

IQFeed Developer Support » C# sample program for Leve1Socket Apr 4, 2018 08:55 PM (Total replies: 5)

I've found all of the sample C# programs very helpful and the comments make for easy following. I have one question about the Level1Socket program.

In Level1SocketForm.cs, lines 201-202 are:

 
// move on to the next message.  This isn't very efficient but it is simple (which is the focus of this example).
sData = sData.Substring(sLine.Length + 1);


Do you have any examples showing more efficient ways? If not, can you please point me towards a better solution. Thank you.

IQFeed Developer Support » How are derivative bars built? Mar 15, 2018 04:57 AM (Total replies: 1)

I have a few technical questions regarding derivative bars in IQfeed. Apologies if I missed this information in the documentation, but I could not find it.

1. Lets say I have requested streaming bars with an interval of 60 seconds. In the messages my client receive, what will [DateTime] represent? Will it be the start time of the interval or the end time of the interval? E.g. Would 12:00:00 be for interval 2:00:00 to 12:00:59, or interval 11:59:01 to 12:00:00?

2. Within IQFeed, what determines when a bar is "finished" being built and sent out to my client? Is it my internal computer clock, IQfeed's server clock, or timestamps on ticks? If it is timestamps of ticks, then I suppose the bar won't be sent to the client until a tick with timestamp OUTSIDE that interval has arrived. That could cause delays in instruments with low volume.


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