Support Board
Date/Time: Mon, 16 Mar 2026 23:13:53 +0000
CME Data Freezing
View Count: 2378
| [2026-01-29 18:43:08] |
| User725043 - Posts: 49 |
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Hi, This is the second day that CME data is freezing. Occurred yesterday at the Open, today at the Open, and twice moments ago. Three connections (please see attached screenshot of IP addresses of the connections). 2 are connected to CME MNQ and 1 is connected to CME MES. Yesterday logged out/in that resolved it. The MES connection only exhibited the pause at the Open yesterday. Today it paused for a several seconds on the MNQ connections and then continues. It was quite noticeable. Could you please suggest how to resolve? |
Private File |
| [2026-01-29 22:06:59] |
| John - SC Support - Posts: 45139 |
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Was it just the data that stopped? Are you able to interact with the system when this occurs? If you have not stopped restarted one of the instances where this occurred. Then please get us the message log by following these instructions: Support Board Posting Information: How to Post Your Message Log (Required In Some Cases) And tell us what time the issue occurred relative to the Global Time Zone set for that installation. For the most reliable, advanced, and zero cost futures order routing, use the Teton service: Sierra Chart Teton Futures Order Routing |
| [2026-01-29 22:27:51] |
| gcUserStudies - Posts: 129 |
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I saw the same behavior today at the open. Price freezes and goes in spurts for a bit. I had thinkorswim mobile opened up at the same time on my phone and it was doing the same thing as Sierra. So I concluded it was either a broader CME issue or on my end or somewhere in between.
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| [2026-01-29 22:46:15] |
| User725043 - Posts: 49 |
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Yes, just the data stopped. Yes, am able to interact with the system when this occurs. Okay, unfortunately did close those instances prior to seeing this response, but will send the Message Log and global time if it occurs again. |
| [2026-01-29 23:33:55] |
| User165981 - Posts: 35 |
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I had the same issue on the NQ open. If it happens again, I'll save the logs
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| [2026-01-30 00:03:51] |
| Sierra_Chart Engineering - Posts: 23225 |
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We do see clear indication of a problem. Substantial market data delays, exceeding 30 seconds sometimes. This was due to degraded Internet connectivity on our side. It did not affect all users. Only some users. It appears as though it was the Lumen Internet connection where the problem was. Hard to know that with certainty though. Unfortunately, these issues are just simply hard to avoid, Internet connectivity issues can just simply happen at any point in time. This is why we use many carriers, and users are distributed among carriers and servers. We will be adding another server in the Aurora data center and another carrier, and this was already planned before this incident. What we recommend you do if you have this problem is select File >> Reconnect. 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: 2026-01-30 00:04:58
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| [2026-02-05 13:43:59] |
| User725043 - Posts: 49 |
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Hi, It just happened again on all three CME connections. Message logs sent via Send For Analysis. Time was about 8:35 EST. |
| [2026-02-05 14:41:17] |
| OrderFlow - Posts: 31 |
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Data lagging here as well
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| [2026-02-05 14:44:02] |
| User165981 - Posts: 35 |
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Me as well, logs submitted
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| [2026-02-05 14:50:25] |
| User220611 - Posts: 6 |
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Have seen numerous freezes and lags in the last few days but today is on a whole new level, constantly delayed data, at least 10 or more seconds. Execution seems to be fine on rithmic side. Denali is currently unusable.
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| [2026-02-05 14:56:41] |
| TraderBake - Posts: 44 |
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Same probleme here, CME lagging
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| [2026-02-05 15:07:53] |
| Rui S - Posts: 220 |
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Same here, data delayed up to one minute until ~10:00 EST - Server DS26.sierracharts.com. On server ds25-2.sierracharts.com it was ok. Futures NQ and MNQ. Date Time Of Last Edit: 2026-02-05 15:09:52
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| [2026-02-05 15:19:19] |
| 284630 - Posts: 12 |
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Hi Sierra Chart team, Since February, increased market volatility has led to multiple instances of delayed market data during U.S. trading hours. This real-time data delay occurs only on subscribed Denali CME L2 data products, while real-time data for Rithmic Comex products remains unaffected. The attached log details the issue. Despite reducing L2 market data and attempting 1-second data intervals, the delay persists during periods of high volatility. This problem was rare previously. After replaying recent market sessions, it appears that during sharp volatility, high-frequency algorithms may increase the volume of market data, potentially overwhelming the Denali servers and causing these delays. I have forwarded the logs for your analysis and hope for a prompt resolution. Thank you. |
| [2026-02-05 15:34:53] |
| joshtrader - Posts: 541 |
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Same here. This is a separate SC instance with Denali, with only 3 DOMs. NQ+MNQ, ES+MES, YM+MYM. The data delay header is reporting frequently 10+ seconds of delay, ONLY ON the NQ DOM. The other two are sub 100ms delays. This issue is NQ-specific. The DOMs are identical, and have been verified to run lightning fast under normal market conditions. Note that the data on the DOM itself is being processed quickly. That is, you wouldn't know it's 10-60 seconds behind, because the updates are occurring quickly. So, this is not a CPU processing issue for sure. It appears simply that the NQ data is arriving to the system late. Date Time Of Last Edit: 2026-02-05 15:37:55
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| [2026-02-05 15:41:44] |
| OrderFlow - Posts: 31 |
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Interesting...my lag was on nq as well.
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| [2026-02-05 18:29:07] |
| Sierra_Chart Engineering - Posts: 23225 |
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Thank you. We are looking up this over. We are going to make some changes this evening. We will post here when done. This all relates to Internet connectivity issues. One day it is one carrier another day it is another carrier. 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 |
| [2026-02-05 22:30:06] |
| User509533 - Posts: 97 |
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FYI (I could be mistaken in my observation): I also noticed delayed NQ/MNQ data around 9:30 AM EST today. At that time, I was running Version 2873 with the following settings: Use OS Timer for Charts: NO Chart Update Interval in Milliseconds: 10 I then switched to: Use OS Timer for Charts: YES Chart Update Interval in Milliseconds: 40 After making this change, the NQ/MNQ data appeared to return to real time (no delay). However, it’s also possible that the data issue was resolved independently around the same time I changed these parameters. |
| [2026-02-05 23:08:41] |
| Sierra_Chart Engineering - Posts: 23225 |
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We have done some reconfiguration. We want you to restart Sierra Chart for the updated server list. There is more for us to do on the hardware side, but unfortunately that part takes weeks to do. 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: 2026-02-05 23:08:53
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| [2026-02-06 01:10:20] |
| OrderFlow - Posts: 31 |
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Thank you, the real test will be at market open tomorrow.
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| [2026-02-06 02:41:59] |
| User852559 - Posts: 42 |
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I'm seeing some unusual behavior of the NQ order book as well today. I have an installation using Denali data with Teton routing that appears normal. However my 3 installations that are using Denali data with SC All Services show way more liquidity in the NQ than is actually there. One unusual thing that I noticed was that there would be large swaths of offers on the book and then we'd trade through them and that same area would go heavily bid and this would repeat every time we traded through those prices. Edit: This went away upon restart and doesn't show anymore nor in the historical depth. It started around the time of the data lag and at the same price range so must've been in relation to that. Date Time Of Last Edit: 2026-02-06 03:19:34
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| [2026-02-06 04:20:53] |
| Deucalion - Posts: 35 |
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Hi, I have similar issues....on newest version and not only does it lag the market but it wont catch up, will drop connection and then reconnect. This is happening periodically and its its very frustrating. I have 2 charts open only (both NQ) and barely any load on data (a weeks worth). I compare it to web panel Trading View , which has never lagged. I am currently travelling in India using my laptop and not sure if I need to change my data server or change the NTP, or something else. How this keeps happening with Sierra every few months is becoming a terminal issue for me. |
| [2026-02-06 14:38:28] |
| Sierra_Chart Engineering - Posts: 23225 |
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We see and understand the issue now. It is one particular server, with this processing problem causing significant delays. We are going to be disconnecting users from it 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 |
| [2026-02-06 14:57:43] |
| Sierra_Chart Engineering - Posts: 23225 |
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There were Internet connectivity issues in the past, but that is not the reason at this point in time. Regarding post #22, your issue is completely unrelated. Try using the ds14-2.sierracharts.com server server in Europe: Sierra Chart Server Settings: CME Exchange Data Feed Server Address and Port Override (Global Settings >> Sierra Chart Server Settings >> General >> Special) 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: 2026-02-06 14:58:14
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| [2026-02-06 14:58:21] |
| User725043 - Posts: 49 |
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Hi, Problem continues with CME MNQ data. Message logs sent via Send For Analysis. Time was about 9:30 EST (NYSE open). Tried Reconnect and Disconnect/Connect several times. Currently showing 3 different prices/time stamps on CME MNQ. |
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