Was wondering how I would go about implementing a dynamic linegraph using the umg editor (or if the UMG editor is even appropriate for doing something like this)
Would appreciate thoughts/suggestions to generate graphs using float array values as data 
Yeah you can use UMG, but you need to make some new C++ functions to access more low level slate drawing functions. I only exposed DrawBox, DrawText and DrawLine. You need to make a DrawLines that more or less does the same thing as UWidgetBlueprintLibrary:: DrawLine, but takes an array of points and forwards them to slate. Then you just use your new function in your userwidget’s OnPaint event.