I got the result I needed this way:
series.events.on("globalpointermove", function(ev) {
if(typeof ev.target.getTooltip() === 'undefined' || typeof ev.target.getTooltip().dataItem==='undefined' || typeof ev.target.getTooltip().dataItem.dataContext === 'undefined') { return; }
else {
if(activeCharts){
let point = ev.target.getTooltip().dataItem.dataContext;
}
}
});