— Overall performance is below average. 
— Scrolling, filtering and scaling are slow (graph #3). 
— Bonus goal is implemented, however animations are slow.

Line charts must be started with local min Y.

Circles on the lines (selected value) in the night version don't match the color scheme.

No window resize support.

When some btn activated, then we switch theme mode and btn has bg from previous theme

Long touch / long click functionality is not realized

Stacked chart. Display incorrect data after zoom-in + uncheck line.

Charts are very laggy in terms of performance.

0 on the left side has wrong color. On the right there is no 0 value at all.

Administrators Telegram, where my graphics? Yesterday I sent a zip archive, but I do not see my work in the list

mode change does not work correctly

Lines dots (circles) on preview that appear when you move the mouse behave incorrectly for the first chart when any of the lines is switched off, but at the same time works correctly in the second chart.
(When empty the tooltip is still displayed, but probably this one could be ignored.)

It is impossible to select less than almost a month on daily graphs. Initial date range selected is almost half a year. (1 Apr to 30 Apr in the screenshot imply that the initial range should be final month)

Percentage chart. Display incorrect data. Zoom-in + uncheck + zoom-out. After hover chart it's fixed, but after this hover pop-up has incorrect data too.

In timeline (navigator) for pie chart there are only 6 days available.
Wrong dates in the title for pie chart.

The drag/resize functionality of the magnifier (search box of the navigator) has minor glitches.

No tooltips and separation of sectors on hover or touch or click on the pie chart pieces.

For single column chart in zoommed in mode the timeline (navigator) is still displayed, but the new buttons for new lines are not displayed.
Also the View button is displayed, but this is a minor thing and can be ignored, I think.

The stacking of the stacked bars is upside down starting from the lowest values at the bottom and putting the higher values to the tops.

Impossible to select in preview the extreme right value (sometimes couple of them - depends on the current range selected)

No percentages displayed in the tooltip of the pointed position in stacked percentage chart

Wrong format of the dates displayed in the title for zoommed in mode of any chart. (Probably a minor thing and could be ignored)

Unable to select time range by dragging in the preview area (outside of the current window).

Issues with pie chart.
The functionality is broken when zooming in on dates at the beginning or at the end of the chart.

Glitches with main percentage chart tooltip when showing pie chart.

Very difficult (almost impossible) to enter zoomed mode for pie chart with mouse at the left half of the chart.

The scaling of lines of y_scaled chart doesn't seem correct. The max value of one line should correlate with the max value of another one at the top on 100% date range.

Issues with zoom in on last but one date of the chart for line charts and bar charts. The final date is impossible to select.