Sorry but the histogram is a data chart from a JPG this information as it is great for general practice. BUT! it is SO FAR from the reality of THE Actual RAW histogram it is worthless. Not to mention RAW PER CHANEL HISTOGRAM.
Zebras are the only way without have a RAW HISTOGRAM one can get accurate sensor reading especially when needed in high contrast or backlight situations.
It is excluded from the FUJI X cameras just like custom shooting menus ie; Bird Shooting where just by selection you can have the camera so to stored settings.