Montinew commented on issue #15488:
URL: https://github.com/apache/echarts/issues/15488#issuecomment-3648204171
I found a practical workaround that works reliably for me.
**Problem:**
With asynchronous time series (timestamps differ slightly), tooltip
aggregation fails because exact x-value alignment is required.
**Workaround:**
Bind each series to its own `time` xAxis and enable `tooltip.smartFormatter`.
smartFormatter allows the tooltip to display a single, consolidated
timestamp instead of showing a separate timestamp per series.
Additional xAxes can be hidden.
```
{
"tooltip": { "smartFormatter": true },
"xAxis": [
{ "type": "time" },
{ "type": "time", "show": false },
{ "type": "time", "show": false }
],
"yAxis": { "type": "value" },
"series": [
{ "name": "Series 1", "type": "line", "xAxisIndex": 0, "data": [[t1,
v1]] },
{ "name": "Series 2", "type": "line", "xAxisIndex": 1, "data": [[t2,
v2]] },
{ "name": "Series 3", "type": "line", "xAxisIndex": 2, "data": [[t3,
v3]] }
]
}
```
<img width="1462" height="662" alt="Image"
src="https://github.com/user-attachments/assets/6400009a-75ec-4515-9751-4c3ffff35b8e";
/>
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