[Chartjs]-ChartJs line chart repaint glitch while hovering over

Here is an update to your fiddle. The primary change (other than fixing the function name typo) is to add

myChart.destroy();

before lines like

myChart = new Chart(ctx).Line(...);

The .destroy() method gets rid of the event handler registrations etc, so you shouldn’t see those weird “ghost charts” when you mouse over the graphics.