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Direct MessagesDate/Time: Thu, 25 Apr 2024 23:02:51 +0000
Log scale freezes and parallel ray doesn't work right
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| [2018-03-17 01:13:42] |
| dtl-saw - Posts: 79 |
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I've found 2 issues with using the log scale. First issue is that I can't adjust the scale, it's frozen as is and I'm unable to use the mouse to click on the y-axis and drag up or down to change the scaling extents. I think it obviously should be adjustable so I must not have some parameter set correctly. Can you suggest what I need to do to be able to adjust the y-axis scale when using log scaling. The other issue I have is when drawing parallel rays on a log scale the rays don't remain parallel but instead change slopes. I don't see how this can be useful to anyone since the whole reason to use a log scale is to look for power relationships that a human eye can perceive. That means 2 straight lines on log scaled data shows a power relationship between the high and low of a channel. When you're tool is changing the slope of one of the rays in a parallel ray tool it becomes completely useless for log plots. Can you fix this or create another tool for using with log scale? |
| [2018-03-17 01:14:10] |
| dtl-saw - Posts: 79 |
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I'm using version 1712
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| [2018-03-17 01:22:36] |
| dtl-saw - Posts: 79 |
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I just saw a previous post that interactive scaling is not possible with log scale. Can you make this a feature request for a future release? |
| [2018-03-19 16:13:45] |
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The other issue I have is when drawing parallel rays on a log scale the rays don't remain parallel but instead change slopes.
In regards to this, this is explained here:Lines/Rays or Other Chart Drawings Move After Drawing Them: Logarithmic Scaling and Rays 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 |
| [2018-09-30 15:09:22] |
| dtl-saw - Posts: 79 |
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I read the release notes on version 1808 and downloaded it to check out your new "Proper implementation of chart drawings on a logarithmic scale". The implementation appears to be working good for positive price changes - a weekly chart of NFLX from 2000 to present looks great. But, when I look at a weekly chart of GE from 2000 to present and place a ray on the 2000 high and the Sep 2007 high for plotting a possible down trend line the ray curves downward parabolic. So it looks like your algorithm is not working for line, ray tools pointing downward. It's encouraging to see you investing time to expand the log scale functionality in SC and I appreciate your efforts to improve this part of your program. |
| [2018-09-30 15:16:23] |
| dtl-saw - Posts: 79 |
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Just looked at up trend line and ray and parallel lines on GE chart mentioned in last post and the lines are curved on the GE chart for both up trend and down trend.
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| [2018-09-30 19:12:52] |
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Yes the proper implementation is curved lines on a logarithmic scale because they are drawn at each chart bar to the true corresponding value. The price data, study data and chart drawings are all linear in their data and those linear values are mapped into a logarithmic scale which will cause a curved appearance. This is a consistent and standardized way that Sierra Chart handles logarithmic scaling. This is what we see: http://www.sierrachart.com/image.php?Image=1538334720642.png This is correct. If either a straight ray drawing on a logarithmic scale or a curved line does not meet your requirements, not sure what more we can do. Another good example is to use the zig zag study where the lines span like 100 bars or more and you can see they are curved. This is simply how linear data on a logarithmic scale will look. Straight lines are still supported with Global Settings >> Tool Settings >> Support Curved Lines on Logarithmic Scale. But we can see some issues with that option disabled. It is new. We need to do some additional work related to it. 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 Date Time Of Last Edit: 2018-09-30 22:36:30
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| [2018-09-30 19:46:04] |
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But there may be a third alternative we could implement where the line remains straight and the extension is done after the Ray coordinates are converted into the logarithmic scale. We will try that. 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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