Creating buckets of percentile

[#1]

Hi I am trying to create groups of users such that they fit into one of the 4 groups below:

0 -25th percentile

26th - 50th percentile

51 -75th percentile

76th - 100th percentile

based on amount of money they have spent. I tried both percentile and quartile functions but they dont seem to work correctly.

[#2]

after think about the question I don't believe you can use the calculated metrics (they can't be used within a segment).

maybe you can try the Histogram or Scatterplot  with calc. metric "revenue per visitor" and "unique visitors" to see some patterns?

[#3]

can we do based on all orders counted together ?

[#4]

how do you create the segment/function so far? is the "amount" based on a single order or more orders counted together?