Support Board
Date/Time: Thu, 01 May 2025 20:24:39 +0000
Unusual Widening of Bid/Ask Spread and Chart Anomaly
View Count: 153
| [2025-02-21 10:53:52] |
| Alofat99 - Posts: 1 |
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Good morning, This morning when I launched Sierra Chart, I encountered an unusual issue where the displayed Bid and Ask lines on my chart would significantly widen as the market moved up or down. I have attached a screenshot of a simple candle chart with the Bid/Ask lines clearly showing the widened spread: Screenshot 1: https://www.sierrachart.com/image.php?Image=1740131181158.png To determine whether this was just a visual glitch, I placed simultaneous Buy and Sell market orders on a separate chart within a different instance of Sierra Chart. As shown in the second screenshot, the orders were indeed placed at the same wide Bid/Ask levels displayed in the first instance. You can also see that the Combined Bid/Ask Size column on the DOM has a gap corresponding to the wide spread. Screenshot 2: https://www.sierrachart.com/image.php?Image=1740131629119.png Interestingly, my main Trading DOM seemed to show correct "Recent Bid/Ask data", and I could see other orders filling within the “gap” that appeared on the problematic chart. I should point out that the Bid/Ask Size columns on the Trading DOM were also showing incorrectly. After closing Sierra Chart and reopening around 4:20 AM (as seen on the chart), the Bid/Ask lines converged again, but the earlier anomaly remained visible on the chart, even after selecting Edit > Reload and Recalculate, Edit > Reload Intraday Charts and Edit > Recalculate All Charts. Furthermore, when replaying the chart, I can recreate the entire event exactly as it occurred. Thank you for looking into this. If you need any additional information, please let me know. When replaying the chart, I can recreate the whole event as it happened. I have recorded the events for both of the charts if you care to see. I can include those as well if you wish. |
| [2025-02-21 14:36:04] |
| Sierra_Chart Engineering - Posts: 19390 |
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Set Sierra Chart to a Tick by Tick Data Configuration. Follow the instructions here to do this: Tick by Tick Data Configuration It should be set this way but just check. Otherwise this may be a scale issue: Chart Scale and Scale Adjusting: Maintaining Same Scale for Multiple Graphs in Chart Region Also make sure the Tick Size of the chart is set correctly: Chart Settings: Tick Size (Chart >> Chart Settings >> Symbol >> Symbol Settings menu) 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: 2025-02-21 14:39:11
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