This is a demo tutorial. While there is no step-by-step commentary available (yet), the live demo below is fully functional. Feel free to open it for full source code.
This demo shows how we can use adapters to selectively disable cursor tooltips on columns with zero-value.
See the Pen amCharts 4: do not show tooltip for zero-value column by amCharts team (@amcharts) on CodePen.24419