Why not a hotkey like CTRL-N to open a new chart and CTRL-D to open a duplicate chart?
*Edit*
I just found the hotkey option for "New Chart" in the hotkey manager. But that only opens the DATA SERIES box, which is already availably by pressing CTRL-F. Why do I need another hotkey?!!!
Needless to say, I don't see the same option for opening a duplicate chart.

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