Support Board
Date/Time: Fri, 11 Sep 2026 11:31:28 +0000
Accuracy in backtesting when increasing replay speed
View Count: 336
| [2026-07-25 17:57:26] |
| User351342 - Posts: 3 |
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Hi, First of all, I think Sierra Chart is an amazing trading platform. One area where I think it could be improved, however, is broader parameter testing for automated strategies. I have a question for the Sierra Chart technical team. Does increasing the **Speed** setting to very high values, such as **400** or even **1000**, affect the accuracy of a backtest? In other words, if I run the exact same strategy with a **Speed** of **1** and then with a **Speed** of **1000**, should I expect the results to be identical, or can higher speed settings reduce the accuracy of the simulation? Thanks in advance for any clarification! |
| [2026-07-27 19:50:36] |
| ForgivingComputers.com - Posts: 1238 |
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I have found that the accuracy degrades with speed, especially with data used from other charts.
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| [2026-07-27 22:59:50] |
| Sierra_Chart Engineering - Posts: 24828 |
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The question is completely dependent upon the behavior of your trading system. There are no changes in the behavior of a back test in Sierra Chart regarding the replay speed. But the trading system can be affected in ways which we do not understand. It is up to you to determine how your trading system will behave with increasing replay speeds. We do not know. The result should be the same as long as your trading system is completely stable in the way that it behaves: In other words, if I run the exact same strategy with a **Speed** of **1** and then with a **Speed** of **1000**, should I expect the results to be identical, or can higher speed settings reduce the accuracy of the simulation? 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: 2026-07-27 23:00:11
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| [2026-07-28 21:27:30] |
| User254520 - Posts: 19 |
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I am personally consistently getting same results with speeds at 1,000 or 200,000 with any of the systems made, so Sierra does not do anything different at different speeds but your system might. Zero degradation. Date Time Of Last Edit: 2026-07-28 21:28:32
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| [2026-07-29 04:45:03] |
| Sawtooth - Posts: 4351 |
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Does increasing the **Speed** setting to very high values, such as **400** or even **1000**, affect the accuracy of a backtest?
I've never witnessed a backtest that didn't, at least to some degree.
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