In the pipeline, you can define a Dimension values of Type: range, so long as you know the range in advance.
In order to retrieve an arbitrary range you can do so with the following query parameter:
Nf=p_PRICE|BTWN 0 100 (for a range)
Nf=p_PRICE|LTEQ 100 (for all < 100)
Nf=p_PRICE|GTEQ 100 (for all > 100
Good luck