Support Board
Date/Time: Wed, 15 Jan 2025 21:00:45 +0000
sc.BaseData array NOT readonly! (was Custom study causing changes to sc.BaseData arrays!)
View Count: 1028
| [2017-09-10 14:31:46] |
| binaryduke - Posts: 373 |
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Hi SierraChart Strange situation. I am coding a custom study and for some reason it is causing the sc.BaseData to be affected. Image 1: Chart prior to custom study being applied featuring standard SC indicators: Numbers Bars (open/close marker in column 1 set to candlestick outline) + High/Low for time period http://www.sierrachart.com/image.php?Image=1505053353860.png Image 2: Custom study has been applied. The only thing this study is doing is checking if time is >= 09:00:00 (note this is when the high has become stuck) and performing some calculations based upon the relationships of sc.High[sc.Index], sc.Low[sc.Index], sc.Open[sc.Index] and sc.Close[sc.Index]. After application of the study, the standard SC indicators (Numbers Bars candlestick outline) are dealing with a 'stuck' high value. This can also be seen in the Chart Values Window. http://www.sierrachart.com/image.php?Image=1505053817566.png This has been tested on v1598 and v1605. Compilation using your remote compiler. Please let me know what if anything I can provide you with to aid diagnosis. I can't begin to think what I can tell you about the study to assist as I cannot see how in any way an ACSIL study could affect the sc.BaseData array. Thanks Lee. |
| [2017-09-10 15:02:30] |
| binaryduke - Posts: 373 |
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I have resolved this. I had a typo where I was comparing sc.High[sc.Index] to a variable. '>=' was mistyped as '=' However, I am surprised by this as the sc.BaseData documentation ACSIL Interface Members - Variables and Arrays: sc.BaseDataIn[][] / sc.BaseData[][] states: Type: Read-only array of float arrays. and I was inadvertently able to assign a new value to an sc.BaseData variable! |
| [2017-09-10 15:38:42] |
| Marmany - Posts: 307 |
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Lee, for info >= is not accurate for comparing floating point numbers. Use sc.FormattedEvaluate with GREATER_EQUAL_OPERATOR.
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| [2017-09-10 16:03:26] |
| binaryduke - Posts: 373 |
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Top tip - thanks!
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| [2017-09-10 21:27:11] |
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sc.BaseData is meant to be read only, but there is no compiler enforcement of that. The custom study can modify the sc.BaseData of the chart. 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, *change* to the Teton service: Sierra Chart Teton Futures Order Routing |
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