When you hover a dot in the graph, some information in the graph are displayed over the graph and can reduce visibility of this one.
We may consider display these information differently, for example:
display only on click (or furthermore, set this product as the selected one in the graph)
display the product info in a dedicated zone in the screen
When you hover a dot in the graph, some information in the graph are displayed over the graph and can reduce visibility of this one. We may consider display these information differently, for example: