Support Board
Date/Time: Mon, 16 Mar 2026 21:49:05 +0000
CME Data Freezing
View Count: 2376
| [2026-02-13 16:03:42] |
| 284630 - Posts: 12 |
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@blt I upgraded my PC mainly to rule out any single-core performance bottlenecks. I believe my current hardware is more than enough for Sierra. So right now, my main focus is on optimizing the network routing and the software side. Because of my physical location, I can’t realistically achieve ultra-low latency like you might. But as long as the connection is stable within the 160–240 ms range, that’s totally acceptable for me. |
| [2026-02-13 16:09:12] |
| blt - Posts: 166 |
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... @284630 one thing is for sure-you def. have the best CPU !!! good luck with everything |
| [2026-02-13 22:46:49] |
| Sierra_Chart Engineering - Posts: 23225 |
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This is the problem: Since I live in China,
It is well-known, that there is high packet loss to China. There is network connectivity available through certain carriers, to deliver data to China with low packet loss which we do not support. I have set up a VPS in Los Angeles and use WireGuard as a proxy service. If you are actually running Sierra Chart on a VPS in Los Angeles, you should not notice any significant delays at any time. If you do, get your own dedicated server or switch providers. Since this thread was created, I have felt that data lag during key trading moments (for example, during price breakouts) has become more frequent, while data remains stable during other periods. Your issues are unrelated to the data feed itself. There is simply insufficient bandwidth and network reliability in your case. Or there is some other problem going on in your case, maybe with the VPS. Latency has been reduced since this thread. Not increased.
Sierra Chart Support - Engineering Level Your definitive source for support. Other responses are from users. Try to keep your questions brief and to the point. Be aware of support policy: https://www.sierrachart.com/index.php?l=PostingInformation.php#GeneralInformation For the most reliable, advanced, and zero cost futures order routing, use the Teton service: Sierra Chart Teton Futures Order Routing Date Time Of Last Edit: 2026-02-13 22:49:13
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| [2026-02-14 03:21:07] |
| Sierra_Chart Engineering - Posts: 23225 |
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The solution for China, is what is described here: https://www.dataplugs.com/en/company/cn2-direct-china/ They are not the only provider of that service. Numerous co-location and server providers, provide the identical CN2 China direct service. The problem is it is limited to 50 Mbs. And we saw some pricing for higher data rates and it goes up astronomically more. For the small number of Chinese customers we have, 50 Mb is probably fine for the time being. The question we have, and we never could get a straight answer on this from the provider, is what international bandwidth (For outside of China) is provided to the server. Since we must have, the direct China connection, and also international bandwidth everywhere else to be able to access the CME data from the USA Midwest. They never give us a clear answer on this. They say international bandwidth is not included but in another answer they say indicate that it is. But we doubt the international bandwidth that we get now. Sierra Chart Support - Engineering Level Your definitive source for support. Other responses are from users. Try to keep your questions brief and to the point. Be aware of support policy: https://www.sierrachart.com/index.php?l=PostingInformation.php#GeneralInformation For the most reliable, advanced, and zero cost futures order routing, use the Teton service: Sierra Chart Teton Futures Order Routing Date Time Of Last Edit: 2026-02-14 03:22:16
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| [2026-02-17 15:27:55] |
| User809555 - Posts: 17 |
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Hello, I'm from Europe. Today CME freezed a lot. Big freeze at 9:28:37 EST Time (lasted about a minute). Then I tried to trade until 9:45 but I gave up because I had at least another dozen freezes ranging from 2 seconds to 10 seconds. In the previous weeks I've experienced other connectivity issues, like very high delay. Since on 5th of February there was a huge delay issue, which was resolved after a reconnect, the day after I watched closely the Delay information on the chart and saw it at normal average for me (which is 700ms). Right at the Open it began to rise like 500ms or so every 1-2 seconds, and after 5 minutes it capped at about 1 minute and 10-15 seconds. Reconnecting did not solve the issue that day. I'm describing this in detail because I hope it can help. By the way today my delay was better than normal at about 450ms and sometimes at 360ms and I never had a Delay so low...Unfortunately it freezed a lot too. I'm going to send right now the message log for the freezing happening today. Also note that today I didn't try to reconnect. Thank you |
| [2026-02-17 15:32:40] |
| Sierra_Chart Engineering - Posts: 23225 |
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These are all due to your Internet connectivity. We do not need to see any logs . None of this is going to help us. There are no problems at all on the Sierra Chart side. This is definitive. You have an Internet connectivity issue. There was no problem on the Sierra Chart side, or with Internet connectivity in our side. Try using the server in Germany: Sierra Chart Server Settings: CME Exchange Data Feed Server Address and Port Override (Global Settings >> Sierra Chart Server Settings >> General >> Special) Address: ds14-2.sierracharts.com This may or may not help. Sierra Chart Support - Engineering Level Your definitive source for support. Other responses are from users. Try to keep your questions brief and to the point. Be aware of support policy: https://www.sierrachart.com/index.php?l=PostingInformation.php#GeneralInformation For the most reliable, advanced, and zero cost futures order routing, use the Teton service: Sierra Chart Teton Futures Order Routing Date Time Of Last Edit: 2026-02-17 17:54:44
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| [2026-02-17 16:10:45] |
| Rui S - Posts: 220 |
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Support - Just FYI: I don't know if User809555 issues in post #54 were internet issues or not, but there was a couple of hiccups / freezes (1 or 2 seconds max) in the data feed here, right in the first minute after the opening. Much less problems for me than User809555 describes he had but definitely not internet here as I'm always monitoring it. |
| [2026-02-17 16:42:49] |
| User809555 - Posts: 17 |
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I forgot to tell you that during the major freezes I've successfully loaded the NBA.com webpage. So I did have internet connectivity at some extent. If there's something I can do to test my connection during a freeze please let me know. Rui S what do you do to monitor your internet connection? Thank you |
| [2026-02-17 17:18:37] |
| Rui S - Posts: 220 |
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I forgot to tell you that during the major freezes I've successfully loaded the NBA.com webpage.
You shouldn't load any pages or use your internet for other purposes when you are trading because that could overload your bandwidth and cause delays or freezes. what do you do to monitor your internet connection?
I use PingPlotter Pro. |
| [2026-02-17 17:54:43] |
| User809555 - Posts: 17 |
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Thank you. Of course I don't have any browser opened during the session. I opened it on purpose to test my internet, although I knew it was kind of a "homemade" connectivity test. I will monitor my connection from now, cuz I have too many disconnections. There are weeks with no hiccups but there are also sessions where the connectivity is a nightmare and I really want to find out the problem. Some months ago I thought it was the Wi-Fi but now I trade with the cable. Well have good decisions on the chart! |
| [2026-02-17 18:40:28] |
| Rui S - Posts: 220 |
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You are welcome! I will monitor my connection from now, cuz I have too many disconnections
Then most probably it's an internet problem, try to figure where it comes from. With PingPlotter you will be able to see the complete route from the origin server to your home router and also all the servers in between. You will be surprised how many times they fail or cause delays. Just check the example attached. Some months ago I thought it was the Wi-Fi but now I trade with the cable.
Yes, don't trade with wi-fi, ethernet cable direct from the router is much better. Well have good decisions on the chart!
Thanks! You too! |
| [2026-02-17 19:08:19] |
| Sierra_Chart Engineering - Posts: 23225 |
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This is definitively not on the Sierra Chart side. I don't know if User809555 issues in post #54 were internet issues or not, but there was a couple of hiccups / freezes (1 or 2 seconds max) in the data feed here, right in the first minute after the opening. Prices / Data Falling Behind: 4.19 - Performing Ping Test to Determine Packet Loss and Latency There is some problem somewhere along the path from your location to the server in the US Midwest. We do recommend trying the server in Germany. Definitely keep an instance of Sierra Chart up connected to the server in Germany and see how it works. You should keep that up side-by-side and see what happens. If you notice the data feed stopping, in one instance of Sierra Chart, and not the instance connected to the Germany server, we want to know. This information is helpful to us. Also reading what you wrote again, a one second freeze, that is really hard to avoid when accessing data over the Internet. Sometimes this simply will happen from time to time and it just simply has to do with packet loss. We were thinking of a freeze, of more like several seconds. or 30 seconds. Sierra Chart Support - Engineering Level Your definitive source for support. Other responses are from users. Try to keep your questions brief and to the point. Be aware of support policy: https://www.sierrachart.com/index.php?l=PostingInformation.php#GeneralInformation For the most reliable, advanced, and zero cost futures order routing, use the Teton service: Sierra Chart Teton Futures Order Routing Date Time Of Last Edit: 2026-02-17 19:12:07
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| [2026-02-17 20:14:50] |
| Rui S - Posts: 220 |
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Sierra_Chart Engineering, Thank you for your reply. What happens is related to poor Internet connectivity, not necessarily with your immediate connection but somewhere else, and the reason the data feed stops is explained here:
Prices / Data Falling Behind: 4.19 - Performing Ping Test to Determine Packet Loss and Latency I'm absolutely aware of that and I agree with you. However, I am constantly monitoring the entire path between your servers and my router and that's the reason I always know when it is an internet issue or not. Most times it is an internet issue. There is some problem somewhere along the path from your location to the server in the US Midwest.
Many times it is as you say, but today was not the case. There were a couple of data glitches just after the opening when big bulks of data came in. Also, I must say that except some rare occasions, the ISPs you are currently using have been stable and usually doing quite well, as well as the two ISPs I'm using on my side. We do recommend trying the server in Germany. Definitely keep an instance of Sierra Chart up connected to the server in Germany and see how it works. You should keep that up side-by-side and see what happens. If you notice the data feed stopping, in one instance of Sierra Chart, and not the instance connected to the Germany server, we want to know. This information is helpful to us.
I've already done that in the past and I can surely do it again, of course. I usually don't use the Germany server because the path to my location (Portugal) is much longer and so it adds some more latency due to that difference of distance. Also reading what you wrote again, a one second freeze, that is really hard to avoid when accessing data over the Internet. Sometimes this simply will happen from time to time and it just simply has to do with packet loss. We were thinking of a freeze, of more like several seconds. or 30 seconds.
I absolutely understand and agree with that. I never complain about that when it happens sporadically as I know it is normal. I've just informed you today because I know you have been improving your system and are monitoring the data feed, so I thought it could somehow be helpful. To finish now, IMHO you have been doing a great job in both Denali data and SC software. |
| [2026-03-03 18:22:19] |
| User725043 - Posts: 49 |
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Hi, Multiple disconnections today and reconnects after a short while. Here are the times in EST: 9:59:35; 11:40:16; 12:48:42; 13:14:01. Logs sent. |
| [2026-03-03 19:27:29] |
| Rui S - Posts: 220 |
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I haven't had disconnections, but lately there has been some short freezes upon the openings (NQ Futures), when the volume is high. For a long time now it wasn't been like that but lately it's been happening regularly, just when there is big bursts of volume. This is just FYI. Just to be clear, I'm sure it's not my internet nor the route from the Denali servers to my location. |
| [2026-03-03 22:23:25] |
| John - SC Support - Posts: 45135 |
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User725043: In each of these situations the following is in your log: DTC Client socket (1) | Close event error. Windows error code 10053: An established connection was aborted by the software in your host machine.
So there is some kind of internet connectivity issue you are having. Refer to the following: Data/Trading Service Connection and Symbol Issues: 1.2. Network Communication or Server Problem For the most reliable, advanced, and zero cost futures order routing, use the Teton service: Sierra Chart Teton Futures Order Routing |
| [2026-03-04 04:20:19] |
| joshtrader - Posts: 541 |
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Multiple disconnections today and reconnects after a short while. Here are the times in EST:
9:59:35; I can confirm that I also had a very long pause (10+ seconds) at exactly this time (verified in my logs just now), after which I did a manual disconnect and connect, after which I did not experience any more issues. It was only one instance of SC. The other had continuous data flow, though I can not confirm how smooth it was as I was focused on the disconnect/reconnect. For a long time now it wasn't been like that but lately it's been happening regularly, just when there is big bursts of volume.
Same for me. They are not super frequent but they are under conditions where many messages are coming through in CME's MDP data (depth updates, trades/fills, etc.). Date Time Of Last Edit: 2026-03-04 04:22:17
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| [2026-03-04 21:09:31] |
| Sierra_Chart Engineering - Posts: 23225 |
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We checked the real-time server processes, on one of our servers for any data delay which could be seen as a data feed stop for users. For March 3, there was no logging of any delays. If there was a problem of only one or two seconds or less than 5 seconds it may not have been caught by the logging though. 10 or more seconds definitely would be. This does not mean there were not Internet connectivity issues, because that would be the most likely reason for the problem. Definitely if you are experiencing multiple disconnections that would definitely be due to Internet connectivity issues, elsewhere. And for the record we did not have, any disconnections on March 3, 2026, all day from our NZ location. This is verified, through the logging. This is on the other side of the world. This is tracking about 75 symbols. Connectivity completely stable. We did notice last Friday, at the 9:30 AM US Eastern time open, looking at ES futures, there was a data feed stop for about two seconds. And we think this may relate, to inefficiency with unordered_maps when they are in use for a long time . As of Sunday evening we are now doing daily reconnects to the CME feeds at 5:05 Eastern time every day now. It was interesting that it occurred on a Friday, so that was after, five days, of market data feed processing. The area of concern relates to market by order data. That is a huge amount of data flow that has to be kept track of. Not merely relayed. It has to be stored in memory. Sierra Chart Support - Engineering Level Your definitive source for support. Other responses are from users. Try to keep your questions brief and to the point. Be aware of support policy: https://www.sierrachart.com/index.php?l=PostingInformation.php#GeneralInformation For the most reliable, advanced, and zero cost futures order routing, use the Teton service: Sierra Chart Teton Futures Order Routing Date Time Of Last Edit: 2026-03-04 21:15:41
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| [2026-03-05 21:34:50] |
| User725043 - Posts: 49 |
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Hi, Have 3 connections. At 15:41:21 EST one connection got disconnected and received a pop-up notice in the platform. Please see the attached screenshot of that. Reconnected after a short period. The other 2 connections remained connected and working well. Log sent. |
Private File |
| [2026-03-05 21:40:25] |
| Sierra_Chart Engineering - Posts: 23225 |
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These are simply due to Internet connectivity issues. This is not within our control. Refer to: Sierra Chart Teton Futures Order Routing: "Secondary Instance is Not Allowing Connections" Connection Error The issue is definitely with your Internet connectivity, and for the record, we monitor these connections from the other side of the world in New Zealand and there were no lost connections all day today with Teton order routing. Completely stable. We are not going to be looking at any logs. We would be wasting massive amounts of time looking at, logs related to Internet connectivity issues. We simply do not do that. Some users Internet connections are absolutely terrible. We were helping one user on a Wi-Fi connection and we were seeing latency, up around 250 ms or more and it was all over the place with variable timing. When it should have been consistently below 50 ms and be solid and stable. Sierra Chart Support - Engineering Level Your definitive source for support. Other responses are from users. Try to keep your questions brief and to the point. Be aware of support policy: https://www.sierrachart.com/index.php?l=PostingInformation.php#GeneralInformation For the most reliable, advanced, and zero cost futures order routing, use the Teton service: Sierra Chart Teton Futures Order Routing Date Time Of Last Edit: 2026-03-05 21:43:10
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| [2026-03-11 13:02:15] |
| Rui S - Posts: 220 |
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Hello Support, Just to let you know that your ISP Lumen servers are not working well today, namely e.g. IP 4.69.143.253 Server name: ae8.8.bar3.Detroit1.net.lumen.tech, among other Lumen servers. Your servers affected are DS26, DS31-2, ds25-2, ds26-2 and possibly a few more. These Lumen servers are constantly failing and causing package loss. This is not a normal situation at all, they have been working well. Unfortunately for me, this ISP Lumen is the one you use that has less latency for my location, Portugal. Thus, at the moment I'm using Zayo servers as an alternative, but Zayo servers latency is 12 to 15ms higher than Lumen's servers, probably because Zayo route has many more servers in their route. I hope this information helps you to resolve the problem with the ISP. |
| [2026-03-11 13:38:05] |
| User449884 - Posts: 206 |
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Im in canada, using 3GB/S optical fiber and i updated to 2888 before market open, and it has frozen at least 4 times from 930-935 EST
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| [2026-03-11 13:51:32] |
| Tony - Posts: 695 |
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I have the same experience (March 11, v.2888), data freezes for 3-5 seconds every couple of minutes.
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| [2026-03-11 13:53:57] |
| pinetrades - Posts: 13 |
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I have been experiencing freezes (1-2 seconds) for the data feed (denali) this morning (9am EST and after). It's been occurring roughly once a minute. I verified there is no packet loss at the same time to other websites (endless ping test to google.com). My bandwidth seems fine (ran speed tests). I checked my sierra chart logs, and I don't see anything related to connection issues. I ran an endless ping test to sierrachart.com, and when the lag/freezing would occur in the DOM, I would also get a timed out message in my ping test. What other steps could be done to verify this issue isn't related to either my computer, or my ISP? I wanted to change servers for the data feed, but I can't find a list of servers with their addresses, I could only find a server address for Japan and Germany. Let me know what I can do to troubleshoot this further. |
| [2026-03-11 14:40:24] |
| nosast - Posts: 318 |
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Same here - freezes from Denali CME on ES and NQ for just 2-3 seconds. Location Europe.
Date Time Of Last Edit: 2026-03-11 14:51:21
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 SNAG_ 2026-03-11 - 09-49-50.png / V - Attached On 2026-03-11 14:50:33 UTC - Size: 42.7 KB - 19 views Attachment Deleted. |
| [2026-03-11 14:57:16] |
| OrderFlow - Posts: 31 |
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Same here with frequent 3 second data freezes this morning.
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