Support Board
Date/Time: Thu, 09 Apr 2026 10:34:08 +0000
Volume profile calculation method?
View Count: 176
| [2026-02-19 21:00:40] |
| warpigs - Posts: 75 |
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Please bear with me because I'm learning... For the drawn volume profile, if I anchor it to a price bar, are the standard deviations calculated by incorporating Bessel's correction (n-1) for a sample? Or is the data set beginning with the anchor bar treated as a complete data set? I searched the docs but couldn't find this. |
| [2026-02-19 22:27:20] |
| John - SC Support - Posts: 45558 |
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Are you referring to the "Mean Price and Standard Deviation" standard deviation? Or something else?
For the most reliable, advanced, and zero cost futures order routing, use the Teton service: Sierra Chart Teton Futures Order Routing |
| [2026-02-19 23:06:39] |
| warpigs - Posts: 75 |
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I’m talking about how VAH/VAL calculated. Am I not thinking about this correctly?
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| [2026-02-20 14:32:53] |
| John - SC Support - Posts: 45558 |
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The Value Area High and Value Area Low do not use a Standard Deviation in their computation. They are calculated by starting at the Point of Control and then finding the volume that is defined by taking the "Volume Area Percentage" multiplied by the Total Volume in the profile and then marking those levels that between which that volume exists.
For the most reliable, advanced, and zero cost futures order routing, use the Teton service: Sierra Chart Teton Futures Order Routing |
| [2026-02-20 16:07:39] |
| warpigs - Posts: 75 |
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Thanks, do you guys have a page with the technical calculation info about it? I always thought the value area was calculated using a standard deviation calculation based on the sample set (volume).
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| [2026-02-20 16:19:30] |
| John - SC Support - Posts: 45558 |
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We have most of our calculations specified for our studies, but the underlying calculations that go into the Volume by Price and TPO are not documented.
For the most reliable, advanced, and zero cost futures order routing, use the Teton service: Sierra Chart Teton Futures Order Routing |
| [2026-02-26 15:47:07] |
| warpigs - Posts: 75 |
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Is that because you’re using some sort of special calculation? I guess I don’t understand, I always thought that VAH/VAL are calculated using a standard deviation method. If not, how are the boundaries of the 70% of volume determined? as in, couldn't VAH/VAL be drawn anywhere just so long as the total volume contained included the point of control and 70% of the volume? What determines the precision of their placement? There are many ways to draw boundaries around the point of control that would include 70% of the total volume. Sorry if this is a dumb question, I assume there’s something I’m not understanding.
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| [2026-02-26 16:05:56] |
| John - SC Support - Posts: 45558 |
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Refer to the following: Time Price Opportunity (TPO) Profile Charts: How Point of Control and Value Area Are Calculated 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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