Support Board
Date/Time: Wed, 27 Nov 2024 10:25:21 +0000
New Instance, Different Data
View Count: 422
| [2023-08-23 19:16:11] |
| User98657 - Posts: 327 |
|
I'm doing some back testing and I've opened a New Instance on two operating SC main instances. This gives me the opportunity to run four back tests at the same time. The problem I'm having is that one of the New Instances is not reporting the same data as the other three. I'm running one chart - NQU23-CME. Three of the charts are reporting the same data for my starting point of 2023-07-05, the other is reporting something very different. Three of them open this day with a price of (roughly) 15292 while this fourth is showing an opening price on that day, at 9:30 eastern, of 15410. All of these charts are the same. I copied the chart book from one to another. They are all using Continuous Contract, Date Rule Rollover, Back Adjusted data. They are all operating in the same contract period (the current contract). It is my understanding the SubInstance gets its data from the main instance so I cannot understand why I'm seeing this. Can you offer any suggestions? |
| [2023-08-23 19:32:25] |
| John - SC Support - Posts: 36309 |
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The first thing to do, if you have not already done so, is to select "Edit >> Delete All Data and Download" for the chart that has the issue. If it was an issue with the data, then this should resolve it. Otherwise, there has to be some difference in the Chart setup. The most likely culprit is usually the "New Bar at Session Start". Really, you would have to check most of the Chart Settings. You would also try copying the Chartbook again and see if the problem persists. For the most reliable, advanced, and zero cost futures order routing, use the Teton service: Sierra Chart Teton Futures Order Routing |
| [2023-08-23 19:42:51] |
| User98657 - Posts: 327 |
|
Thanks John. I should have mentioned that I did delete and download, more than once. I will look again for chart differences, but I also simply opened a new chart and it too has this different data. This confused me. Had I seen a difference between the newly created chart and the copied chartbook I'd have had something to work with. But both the newly created chart and the copied chartbook match each other and differ from my other three instances. |
| [2023-08-23 21:13:59] |
| John - SC Support - Posts: 36309 |
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As we mentioned, check the "New Bar at Session Start" and make sure it is set the same way for all the charts. Also apart from Chart Settings, make sure your "Global Settings >> Data/Trade Service Settings >> Common Settings >> Intraday Data Storage Time Unit" is set to the same setting for all instances. For the most reliable, advanced, and zero cost futures order routing, use the Teton service: Sierra Chart Teton Futures Order Routing |
| [2023-08-23 23:27:14] |
| User98657 - Posts: 327 |
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All of those do match.
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| [2023-08-24 15:26:26] |
| John - SC Support - Posts: 36309 |
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Can you get us the two charts (one that shows properly and one that does not) and we'll take a look. Follow these instructions to get us a single chart for each chartbook: Support Board Posting Information: Providing Chartbook with Only a Single Chart For the most reliable, advanced, and zero cost futures order routing, use the Teton service: Sierra Chart Teton Futures Order Routing |
| [2023-08-28 19:09:16] |
| User98657 - Posts: 327 |
|
John, I wanted to close the loop on this, and I think I've discovered the issue. I tried downloading three unique and new installs to my machine. To save time (of course) I copied my Data folder to the new installs. When I loaded a specific chart period, that did not include today (so I'm not using the live data feed), my data was wrong in all three new installs. I deleted those and installed a fresh install. I set up a new chart and finally, after making sure everything matched my existing chart parameters on my live trading instance, I am seeing the same data. My conclusion is that I have a corrupt data file, or files, in my existing Data folder. Please let me know if that makes sense to you. |
| [2023-08-29 13:49:19] |
| John - SC Support - Posts: 36309 |
|
It is possible. If you have not already deleted the file, then exit from Sierra Chart in the installation with the problem and open the File Explorer (file system window) and go to the 'Data' folder that is under that Sierra Chart installation. Find the file with the name of the symbol, exactly as it is in the chart that has the problem. If you have file extensions showing, it will be a .scid file. Delete this file. Then restart Sierra Chart and the data will be redownloaded. For the most reliable, advanced, and zero cost futures order routing, use the Teton service: Sierra Chart Teton Futures Order Routing |
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