Use range in Y axis in kibana

Hi everyone,

we have requirement
x axis would be time,
y axis would display two metrics "size_disk" count,"disk_limit"(in range 100GB to 1000GB).

Please suggest how to obtain this..

As we don't have range aggregation in y axis metric we are doing graph in following way
y-axis:size_disk count
selected "range" aggregation for disk_limit(100GB to 1000GB)

Please suggest is this way correct ....Or we need to follow another way for obtaining this

Thank YOu