helgasoft

have you tried [grid with axis sync](https://echarts.apache.org/examples/en/editor.html?c=candlestick-brush), or [connect](https://echarts.apache.org/en/api.html#echarts.connect) ?

duplicate of #16150 > whenever we have time-based data and adjust the zoom level, the data should be grouped and split accordingly. Different formatters for different time granularity is implemented...

Good explanation. And a [nice feature](https://www.amcharts.com/docs/v5/charts/xy-chart/axes/date-axis/#dynamic-data-item-grouping) of _amcharts_. ```groupData:true``` + "The threshold can be changed using [groupCount](https://www.amcharts.com/docs/v5/reference/dateaxis/#groupCount_setting) setting"

suggestion: 1) precalculate min and max for all series, 2) add a line with no name and no data 3) add min/max marklines to this extra line

not sure what you are trying to accomplish with _loadImage_ since it is not used anywhere... Images could be used as background or symbols - [Demo Code](https://echarts.apache.org/examples/en/editor.html?c=line-simple&code=MYewdgzgLgBADgS2DAvAKBjA5AEwIZR4BcCAtngOYCmA9BQgGYDcARnhFQGwAsANAEoAGADYBxAPIARYQAsAogEEFARQUBZVQvH8AEjvEA1AMoBpAK44G4s8IBOR8XADMAdXEBPSQC0znZTgA3AGFgGQAFURBhK0EQGgANACEIGgYAOQB3BgArL0EGW2EnGgAvdwB2GiqaDKU6-obGpuaW1pagnQBWRIUAayUehQAZRtVBpQMDAEkghy9RYSDVEAgAKU5SM3KGBHcvKhMARzSTABUQZVFJCDUADhkeyQoAVXiQUQUEQ5kjALhO1RgZQmURTF4yDIAMWeAE0hkEDJJIUFbCZnnIAIzCRJ4AIKAwISFTaSnKakFgmIKdUSkABMD0ERmxQUSGgQiUEz2yU1U5SwTDQIDgUAQ4FQMAA3hgYGxgL0KLYQGYwDgglEQLYiJKYGRKFQtVgZFAoHAIEQqlRQnhbFAIAA6PBwPChKh2jUUGhUMA0XXUFLCEAUEB2uBgChYXgwWxUOBUAgGsAgAC00djBAjMCFzoQUHcREEdtpMAAvrxpQAPBTlhBmyXSzD4QhagDaWDU4AzWFOZionZcVBwndOMjMnchtgQnaM6cjWCMyqwAF1paXpe4qzWtRLV5gOBOqLXm_W65hTzBG8QYM3brTBJGAJxOWkPwQYh9OPgwDG0-93r9OJw_wxJ9BEXMsz0wXNYwNCBgAIKAqFsCNj13dxySiA1fX1KosBgABqeAkHAiCIDQlgoiMBASn1GBOkEY9i2lZdiyYIA)

> this functionality is not available specifically for candlestick charts Correct, no labels for _candlestick_. But it has _markPoint_ which has a label 🎉 [Demo Code](https://echarts.apache.org/examples/en/editor.html?c=candlestick-simple&code=CYQwLiAEC8kNoChLJcuByATABgIwHYBaXbQzAFnQBpIcaBmcmkhgDivVwGcx0BdKklQoMOAsVKYArNUjlsDKQwWQpCrADtg_QcJFY8REmQBss-rjYN6Nck3T0ATtoFC9owxLL5z7SLiVkQPJMDnIwAAt-N0g-AG4EABsQACMuGEhQCAA6AFsQAAcACgKYAD5IAG8hRwBTMABXRw0qyA0QXNqALgK4KQFIAGMAe2HnLvhe7AGSuFw-AGpezD4ASgB6FcgAXwTt1YRhgrAAS2GW2GrkAA8AQWuTrgnKyDAATwLu9EHwWoBzMZvdDbXSQN73R7PEFCMCjRKnApdF7Q5BZEBcerPSBcYZNQbdTLgKAo7G1RwnWpPeAxK7Cd6fCbfEBaRKU06DADW1BiyFqGhGwAJtL01wmKjeXTmVFCNnIrj0JNQ-UcHIACsMThowM8eSguG9cilhokAMonABeBJUuuQyRStUSSMgBWGXBOp3OjNZADNeDRvWN8mAwGSuuhKiltsDQXo0RM7VwaDbsSdWVqJmBHA1ajGUNsYvnkHwELsgA)  NB: please close...

The simple solution, since zoom/reset is shared, is to use **only one** toolbox for both charts.

sorry, I meant "only one **visible** toolbox". But once hidden, zooming cannot be started on that second chart and has to be initiated always from the first. Which is a...

it seems your chart has scatter3D in combination with line3D. Please provide full working sample code.

> where to find the default formatter function maybe check getFormattedLabel calling leveledFormat: https://github.com/apache/echarts/blob/fc6656f12ce75d02bc53807532d72168fce372b9/src/coord/axisHelper.ts#L241 https://github.com/apache/echarts/blob/fc6656f12ce75d02bc53807532d72168fce372b9/src/util/time.ts#L162