Support Board
Date/Time: Mon, 17 Mar 2025 11:32:05 +0000
[BUG] ZigZag only paints 1800 days of data
View Count: 450
| [2022-09-06 13:56:58] |
| maxima120 - Posts: 144 |
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I tried several ZigZag studies - SC original plus few I had made during the past decade. All of them only works for first 1800 days, so if the chart (40 range - I dont know how many bars tbh) has more than 1800 days - ZZ simply outputs 0 for the reminder of most recent days.. I walked through the source code - there is a function which does most of the work which has no shared source code. I guess it has a bug because the rest of the code has no apparent limits. Could you please fix it asap? Thank you |
| [2022-09-06 22:21:17] |
| John - SC Support - Posts: 38678 |
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We do not see this. We put on a chart with 2000 days and the Zig Zag study drew on nearly all the bars. The only area where it did not draw is the most recent data in which there were about 30 bars that did not have any information. But this is due to how the Zig Zag study works in that it does not draw the line unless there is an inflection point, and since there was not another inflection in the data, it does not draw the unfinished line.
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| [2022-09-06 22:48:19] |
| maxima120 - Posts: 144 |
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I added it to a tick-nyse 40 range chart. I don't know how many bars there. I'll have a look tomorrow
Date Time Of Last Edit: 2022-09-06 22:48:32
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| [2022-09-07 11:42:20] |
| maxima120 - Posts: 144 |
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I numbered bars and ZigZag (default values - out of the box) stops calculating near bar # 16,777,200
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| [2022-09-07 17:09:46] |
| John - SC Support - Posts: 38678 |
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Is that relatively near the end of the chart? Is it just that there is not another inflection point before the end of the chart?
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| [2022-09-07 17:12:23] |
| John - SC Support - Posts: 38678 |
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Another way to check this is to change the Input for Reversal % for Calculation Mode 1 to 0.01. This should give you a reversal at every bar (or nearly so). Therefore, it should show the lines all the way to the end of the chart.
For the most reliable, advanced, and zero cost futures order routing, use the Teton service: Sierra Chart Teton Futures Order Routing |
| [2022-09-08 13:26:02] |
| maxima120 - Posts: 144 |
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no. its not nearly the end of the chart. it is 16mil bars from the right. so on the left there will be as many bars as you make the chart length. could be another several million. its very simple to repo. open tick-nyse 1 min chart apply zigzag observe zigzag paints the whole chart change "data limiting" to 3000 days observe zigzag paints the whole chart change "bar period" to 40 rng observe zigzag stops working on 2021-7-28" (ZigZag value == 0 to the end of the chart) it is more than a year ago - few millions of bars left without ZigZag not just few until next "inflection point" forms.. hope this clears it, but please let me know if you need more info. |
| [2022-09-09 21:48:16] |
| John - SC Support - Posts: 38678 |
|
Yes, we see this occurring. The only thing we can say for sure is that it is related to the underlying code for the study and that it can not handle more than about 1.5 million bars. The simple solution is to not use the study on that many bars. If necessary create another chart with fewer bars on it and apply the Zig Zag study on that chart. 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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