The majority of the charts right now choke heavily on large datasets.

http://dojo.telerik.com/urIne - This example shows 20,000 points on a scatterLine chart.  It takes a very long time to render this and, when panning or zooming, the redraw time is huge.  This means it is completely unsuited for any large data sets (I've found anything over ~1000 points creates a major lag for the end user).

Well basically the idea is as in the topic. Sometimes we need to show something in hh:mm:ss format on y-axis and it's not possible.

Currently, Category Axis Label Rotation will only rotate around the center of the label.  When labels are long, they do not align well with the chart (e.g. column chart).  See the following forum post for more info:
http://www.telerik.com/forums/categoryaxis-label-rotation---align-with-column-chart

The bar chart should read the value for the first day or the week from the current culture set with kendo.culture.

We dynamically update our charts based off a polling period. If there was tooltip show/hide events, we could suspend polling while the tooltip is visible. Currently, we continue to poll and when the dataSource is updated, the tooltip goes away. This unfortunately leads to another problem that when that tooltip is displayed again, the displayed point no longer resides on the plot line. I'll file a defect report for that.

Need the ability to group related bars on UI Chart.  We are not able to accomplish this using spacing and gaps currently.  We have multiple series of data but some of the series of data is related and there is no way to put the bars closer together to show the relationship without bunching all bars for a given interval together.

The only way to wrap text in category axis labels on charts is to introduce the new line character ('\n'). This is fine on fixed-width charts where labels are known at design-time. However, when dynamically adding series to charts and resizing within a responsive site, it is impossible to know where and when to use '\n'. Can a feature be implemented whereby labels flow within the bounds of their corresponding group in the chart?

Update your stock chart with Financial indicators, like SMA, EMA, VWAP and many more. These indicators are useful in trading analysis.

Have the possibility to use a specific dashType when the graph is set to "interpolate" for the missing values (null values)

Please see the attached image in this thread : 
http://www.telerik.com/forums/series-missingvalues-interpolate-using-a-different-series-dashtype

Hi,
What I am looking for is a "better" way of carrying out the manual calculation for label skipping:
http://www.telerik.com/forums/how-to-access-charts-(chartarea)-width-to-calculate-labels-step(x)

Preference would be similar functionality to the categoryAxis itself (autoBaseUnitSteps/baseUnitStep/maxDateGroups) but it would only affect the labelling without aggregating the data.

Assuming similar functionality to CategoryAxis using a step of "auto" the maxDateGroups should also have an "auto" setting that would adjust the max groups so that the labels never overlap.

Thanks

Chart series are defined with custom marker color & type(Triangle, Square). The color applied in the series get reflect in the legend color but the market type defined at series not applied to the legend.

By default all the legends are displayed as "Square" is there a way to customize or overrride to get allign with the marker style defined in each series.

Current Label Position, Padding & Rotaton helps to adjust the label. Am  looking to get implement a approch where each slice/Wedge represent with a unique name so like to show the x axis label in the middle of the slice/wedge instead of label appearing along with the line.

The same case in Y Axis to show the label in the middle of the circle instead on the line of the circle to make it clear on the each circle represnt the entire circle.

How to achive those or any alternative for the same

Would like to have the ability to multi-group on chart's x-axis. Sample chart as http://goo.gl/h4l4C3

Extend the chart notes functionality to accept an image or any styled element, or a new type of data annotation where an element can 
be placed on the chart at a specific X and Y value

It would be very helpful if we could catch the click on a plotband to enable interaction or create clickable regions on the chart

The only series.highlight option that seems to be supported by "column" charts is highlight.visible.

The other options, such as border and color should be supported.

As per support ticket 806897

Telerik: "By design both seriesClick and plotAreaClick events of Kendo UI Chart  don't contain information about the clicked button or mouse coordinates. We will appreciate it if you submit this idea as a feature request at our UserVoice portal - this way the community would be able to evaluate it and if the suggestion gains popularity we will consider its implementation for future releases."

Original request:

We are using mvvm binding to your Chart events

seriesClick
plotAreaClick

both of these events I am unable to determine which mouse button caused the click.

Is is possible or should I raise a user-voice for this?

I want to run different code if the user right-clicked or if the user normal clicked on the chart.

I would also like to know the x,y pixel position of the mouse (or tap, or tap-hold) event because depending if they interact with the top of a bar chart bar or the bottom I want to run different code...

I cannot find any of this information in the event object.

When I wrap the chart in a data-role touch widget and use the touch widgets event handling I can get this information, but it would be better that the chart events make this available.

We need functionality to allow annotations to charts (e.g. free text).

We need to annotate our charts with text that is:

- not a series value or note
- not a category note
- has no relationship with the plot data
- not a title

An example is text outlining the source of the data, 

We have succeeded in annotating charts with Snap.svg.js but the annotations do not survive the imageDataUrl() function for download (or the svg() function).

Axis & series notes won't achieve what we want to do.

We need to place free text (for example) at the top-left, top-right, bottom-left or bottom-right of the SVG.  Most importantly, it would need to be incorporated in the imageDataUrl and svg methods.

At this time rendering a chart based on a large amount of data takes a while during that period:
- loading animation stops moving
- browser does not respond to any action
- worst case the bowsers long-running-script alert appears

Suggestions:
- Would it be possible (for telerik) to do the rendering of chart in a JS web worker (JS background thread)?
- and/or is it possible to cut rendering code into small pieces (common solution to avoid browser message mentioned above) using setTimeout()? 
- give user the ability to stop rendering chart (ideally show percentage of rendering progress)

Benefits:
- keep loading animation moving while chart is rendered
- letting the user decide to stop the script if it takes too long
- suppressing browser message caused by long running script

add delay parameter for the chart tooltips (like showAfter property for the kendo.ui.tooltip) so you're able to configure if you'd like to see a tooltip if you just move the mouse pointer over a chart.
Parameter should be available on all wrappers esp. MVC.