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20 Most recent posts:
IQFeed Developer Support » Price change updates after market close May 2, 2018 10:28 AM (Total replies: 2)

Hi Tim,

Thanks for your prompt reply. Your first logic example as you said doesn't apply since many of the symbols we look at do have over night trading. As an alternative to your second example, would we be able to only process update messages where the "Market Open" field = 1? This would greatly simplify our logic if it works.

Here is a Futures commodity where I noticed we get a Q Update Message with a second 's' when the market is closed.

2018-04-30 13:30:10.654 INFO QuoteFeed:140 - Q,@RSK18,04/30/2018,09:59:23.224,,527.0,54,530.1,04/30/2018,s,1,
2018-04-30 13:30:10.657 INFO QuoteFeed:140 - P,@RSK18,04/30/2018,09:59:23.224,,527.0,54,530.1,04/30/2018,,0,
2018-04-30 13:30:10.657 INFO QuoteFeed:184 - Summary recieved: P,@RSK18,04/30/2018,09:59:23.224,,527.0,54,530.1,04/30/2018,,0,
2018-04-30 13:30:10.657 INFO QuoteFeed:140 - P,@RSK18,04/30/2018,09:59:23.224,,527.0,54,530.1,04/30/2018,Cbasohlc,0,
2018-04-30 13:30:10.657 INFO QuoteFeed:184 - Summary recieved: P,@RSK18,04/30/2018,09:59:23.224,,527.0,54,530.1,04/30/2018,Cbasohlc,0,
2018-04-30 13:30:10.657 INFO QuoteFeed:140 - F,@RSK18,36,,,541.7,488.0,,,,,,,,,,,,,,,,,,CANOLA MAY 2018,,,,,,,,,,, , ,,0,11,1,,9.28,8,54,04/25/2018,06/23/2017,,,,,,05/14/2018,,,RS,
2018-04-30 13:30:10.657 INFO QuoteFeed:177 - Added symbol metadata for @RSK18
2018-04-30 13:42:48.708 INFO QuoteFeed:140 - Q,@RSK18,04/30/2018,09:59:23.224,,527.0,54,531.3,04/30/2018,s,0,
2018-04-30 13:42:48.708 INFO QuoteFeed:140 - P,@RSK18,04/30/2018,09:59:23.224,,527.0,54,531.3,04/30/2018,,0,
2018-04-30 13:42:48.708 INFO QuoteFeed:184 - Summary recieved: P,@RSK18,04/30/2018,09:59:23.224,,527.0,54,531.3,04/30/2018,,0,

When I looked on the ICE exchange it shows that the settle price on 4/30/2018 was 530.1 which matches the first 's' when the market is open, not the second 's' which has the settle as 531.3

So this logic would be roughly this:

if MarketOpen = 1
if MessageContents contains 's'
use SettlePrice
else
use LastPrice
end if
else
don't update price
end if

Thanks.

IQFeed Developer Support » Price change updates after market close May 1, 2018 03:28 PM (Total replies: 2)

I'm a new developer working with iQFeed and DTN and the commodity markets in general. We have an application that uses the iQFeed 'Q' Update Format messages to update data in our system. We need the most recent Futures prices to be stored in our application. When the "Message Contents" field contains a 'C' or an 's' we know to update the price, so we will change the price in our application to reflect this trade update. I'm expecting that when we get the 's' this would be the last update we receive for the trading session. The issue we are experiencing though is after we receive a settle price from iQFeed, we are also getting additional 'C' update messages which changes the price in our application away from the actual settle price. Some of our users are using other realtime tools such as DTN ProphetX and notice the last trade price doesn't match.

Here is the FIELDS we request from iQFeed:
Symbol,Last Trade Date,Last TimeMS,Tick,Last,Last Market Center,Settle,Settlement Date,Message Contents

Here is an example logs from our application that shows the iQFeed data:
(notice we are still receiving the 'C' trade update messages after the 's' update which occurred at 13:19:18.159)

2018-04-03 13:16:33.046 INFO QuoteFeed:140 - Q,@RSK18,04/03/2018,14:16:33.139,183,526.2,54,524.8,04/02/2018,C,
2018-04-03 13:17:21.844 INFO QuoteFeed:140 - Q,@RSK18,04/03/2018,14:17:21.919,183,526.2,54,524.8,04/02/2018,C,
2018-04-03 13:17:24.434 INFO QuoteFeed:140 - Q,@RSK18,04/03/2018,14:17:24.527,173,526.4,54,524.8,04/02/2018,C,
2018-04-03 13:17:46.586 INFO QuoteFeed:140 - Q,@RSK18,04/03/2018,14:17:46.687,175,526.2,54,524.8,04/02/2018,C,
2018-04-03 13:17:46.586 INFO QuoteFeed:140 - Q,@RSK18,04/03/2018,14:17:46.687,183,526.2,54,524.8,04/02/2018,C,
2018-04-03 13:19:14.009 INFO QuoteFeed:140 - Q,@RSK18,04/03/2018,14:19:14.107,173,526.5,54,524.8,04/02/2018,C,
2018-04-03 13:19:16.927 INFO QuoteFeed:140 - Q,@RSK18,04/03/2018,14:19:17.029,173,526.6,54,524.8,04/02/2018,C,
2018-04-03 13:19:16.927 INFO QuoteFeed:140 - Q,@RSK18,04/03/2018,14:19:17.029,183,526.6,54,524.8,04/02/2018,C,
2018-04-03 13:19:17.379 INFO QuoteFeed:140 - Q,@RSK18,04/03/2018,14:19:17.479,183,526.6,54,524.8,04/02/2018,C,
2018-04-03 13:19:18.159 INFO QuoteFeed:140 - Q,@RSK18,04/03/2018,14:19:17.479,,526.6,54,526.5,04/03/2018,s,
2018-04-03 13:19:18.159 INFO QuoteFeed:140 - P,@RSK18,04/03/2018,14:19:17.479,,526.6,54,526.5,04/03/2018,Cbasohlc,
2018-04-03 13:19:18.159 INFO QuoteFeed:184 - Summary recieved: P,@RSK18,04/03/2018,14:19:17.479,,526.6,54,526.5,04/03/2018,Cbasohlc,
2018-04-03 13:19:18.159 INFO QuoteFeed:140 - F,@RSK18,36,,,537.9,488.0,,,,,,,,,,,,,,,,,,CANOLA MAY 2018,,,,,,,,,,, , ,,0,11,1,,8.72,8,54,07/11/2017,06/23/2017,,,,,,05/14/2018,,,RS,
2018-04-03 13:19:18.159 INFO QuoteFeed:177 - Added symbol metadata for @RSK18
2018-04-03 13:19:43.182 INFO QuoteFeed:140 - Q,@RSK18,04/03/2018,14:19:43.249,183,526.6,54,526.5,04/03/2018,C,
2018-04-03 13:19:43.182 INFO QuoteFeed:140 - Q,@RSK18,04/03/2018,14:19:43.249,173,526.7,54,526.5,04/03/2018,C,
2018-04-03 13:19:43.182 INFO QuoteFeed:140 - Q,@RSK18,04/03/2018,14:19:43.249,183,526.7,54,526.5,04/03/2018,C,
2018-04-03 13:19:43.197 INFO QuoteFeed:140 - Q,@RSK18,04/03/2018,14:19:43.249,183,526.7,54,526.5,04/03/2018,C,
2018-04-03 13:19:51.107 INFO QuoteFeed:140 - Q,@RSK18,04/03/2018,14:19:51.223,175,526.3,54,526.5,04/03/2018,C,
2018-04-03 13:19:51.122 INFO QuoteFeed:140 - Q,@RSK18,04/03/2018,14:19:51.223,175,526.2,54,526.5,04/03/2018,C,
2018-04-03 13:19:51.138 INFO QuoteFeed:140 - Q,@RSK18,04/03/2018,14:19:51.223,183,526.2,54,526.5,04/03/2018,C,
2018-04-03 13:19:51.138 INFO QuoteFeed:140 - Q,@RSK18,04/03/2018,14:19:51.223,183,526.2,54,526.5,04/03/2018,C,
2018-04-03 13:19:51.138 INFO QuoteFeed:140 - Q,@RSK18,04/03/2018,14:19:51.223,183,526.2,54,526.5,04/03/2018,C,
2018-04-03 13:19:51.138 INFO QuoteFeed:140 - Q,@RSK18,04/03/2018,14:19:51.223,183,526.2,54,526.5,04/03/2018,C,
2018-04-03 13:19:51.138 INFO QuoteFeed:140 - Q,@RSK18,04/03/2018,14:19:51.223,183,526.2,54,526.5,04/03/2018,C,
2018-04-03 13:19:51.138 INFO QuoteFeed:140 - Q,@RSK18,04/03/2018,14:19:51.223,183,526.2,54,526.5,04/03/2018,C,
2018-04-03 13:19:51.138 INFO QuoteFeed:140 - Q,@RSK18,04/03/2018,14:19:51.223,183,526.2,54,526.5,04/03/2018,C,
2018-04-03 13:19:51.138 INFO QuoteFeed:140 - Q,@RSK18,04/03/2018,14:19:51.223,183,526.2,54,526.5,04/03/2018,C,
2018-04-03 13:19:51.138 INFO QuoteFeed:140 - Q,@RSK18,04/03/2018,14:19:51.223,183,526.2,54,526.5,04/03/2018,C,

My understanding of this is that it's normal to get additional trades enterred for that Future after the market has settled. I see there is a field called Market Open that you can request from iQFeed, but I don't know if this would help since these updates appear to come in prior to this Future market sessions closing time of 13:20 CT.

Is it possible to somehow trigger on this settle price update and ignore the additional trade updates?

Is there some kind of logic that I can apply to my application so that these additional trades don't change my settle price?

Has anyone else run into this and how did you address it?

Thanks, any help you can provide would be great.

IQFeed Developer Support » Continuity of feed data Jun 21, 2013 08:31 AM (Total replies: 1)

I'm evaluating whether IQFeed will be a good fit for my application. It is critical that I receive all tick data for the symbols I've subscribed to. In the documentation I've look at so far I don't see anything ensuring that I won't miss any data in the event of an outage of some sort (DTN, ISP, my server, etc). Can you confirm whether or not IQFeed has the ability to catch up the data data that would have been transmitted during the outage so no data is missing (delayed now of course) or out of order?

I had been looking at NxCore which provides this capability but I'd prefer the IQFeed API.


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