Some unnecessary smoothing happens in stocks

[chapkovski]

I am not sure if I describe the problem correctly, but I'll be happy to provide raw data and more explanations.

We have a data (available here: https://blocke-channels-bucket.s3.amazo ... beled.json).

Sometimes it has some sharp jumps in it (most likely when the data collector was off/broken or whatever).

If we plot this in python for example it looks like that:



So it can be clearly seen that around June 5th 2020 there was a drop to 0.

But the same area rendered in Highcharts smooths this out:



You can see it in live rendering here: https://chapkovski.github.io/anomaly_tr ... 4135800000

What's happening here, and can we make the rendering similar to what we have in Python?

Thanks a lot in advance!

[chapkovski]

I've added some details here: https://stackoverflow.com/questions/710 ... ng-my-data

[magdalena]

Hi,

Thanks for contacting us with your question!

I suppose it is caused by dataGrouping. In the Highcharts API we can read:

plotOptions.line.dataGrouping

Data grouping is the concept of sampling the data values into larger blocks in order to ease readability and increase the performance of the JavaScript charts. Highstock by default applies data grouping when the points become closer than a certain pixel value, determined by the groupPixelWidth option.

You can disable the dataGrouping in the following way:

Code: Select all

plotOptions: {
    series: {
        dataGrouping: {
            enabled: false
        }
    }
},

API Reference:
https://api.highcharts.com/highstock/pl ... taGrouping

Docs:
https://www.highcharts.com/docs/stock/data-grouping

Let me know if that was what you were looking for,
Regards!

[chapkovski]

hi, thanks a lot! That exactly what I was looking for.

[magdalena]

You're welcome! In case of any further questions, feel free to contact us again.

[TimeBomb]

Anything like this for 2023? Thanks!

[jakub.s]

Hi @TimeBomb,

Welcome to our forum!

Could you please elaborate on your question?

Here's a demo showing dataGrouping disabled in case that's what you're looking for: https://jsfiddle.net/BlackLabel/f6emq4zd/

Best regards!