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fan chart
A median path with nested bands around it, narrow for the middle of the range and wider for the tails. Width carries the meaning: a fan that stays thin says the next months look much like the last ones, and a fan that flares says one bad month early can move everything after it.
A median path with nested bands around it, narrow for the middle of the range and wider for the tails. Width carries the meaning: a fan that stays thin says the next months look much like the last ones, and a fan that flares says one bad month early can move everything after it.
Example
Best when you have enough past variation to build honest bands and the spread matters as much as the middle.
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