I show a custom tooltip when mouse hovering on any data point on my line series. But the tooltip also shown when mouse hover on the line, where there are no data points; It somehow takes the nearest data point value and display in tooltip window. The worst part is, at some points it shows 'null' as the value. Please let me know if someone has any idea how should I stop this. Thanks.
Could you clarify a bit more?
Note there are actually two styles of tooltips in the chart, the style you get when you set a tooltip on a series, and additionally the type you get when you add the itemTooltipLayer series to the chart. You may want to see if the latter meets your expectations.
-Graham