I am creating a two column, column chart comparing how many necklaces we made (column 1) vs. how many we need (column 2). The chart is split up by hour starting from @d-22h to now(). Yet, if no necklaces are created during a hour, the columns will not be produced and will leave a blank space.
If no events in a hour:
Necklaces made=constant value of necklace made during last event hour (constant)