Support Board
Date/Time: Thu, 18 Sep 2025 01:33:16 +0000
Post From: Sierra Chart SPY Volume off by 30-50%
| [2022-08-04 09:26:08] |
| Techotomy - Posts: 104 |
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It should go without saying that you cannot accurately trade the open if you have inaccurate financial data for the open. Either you are seeing the same incorrect opening volume I am seeing and should fix the issue on your side since it significantly differs from both NYSE (https://www.nyse.com/quote/ARCX:SPY) and your own data source (https://www.barchart.com/etfs-funds/quotes/SPY/overview), or you are seeing different volume than I am seeing and should help me fix the issue on my client's side. If you need other examples of misreported one-minute volume bars to narrow down the problem, there are plenty instances I can provide since the issue is fairly consistent and ubiquitous.
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