[jordanlev]

I browse with cookies and localStorage disabled by default (I whitelist sites I need to log into). Your site just comes up blank for me... maybe it requires localStorage for some reason? Not sure why it would, but at least you might want to display a message indicating such.

[victordg]

oh, it uses localStorage to store your chart data so that you can refresh the page and you won't lose your changes.

But you are totally right that it should not be requirement. I will fix that today. Thanks for letting me know!