Calculated Item: Last N'th value - is it possible?

[registration_is_lame]

Is is possible to use last n'th value in Calculated item?

last("net.if.in[eth0,bytes]")

That is only for last value.. Is it possible for last N'th value?

like

last("net.if.in[eth0,bytes]".(#5))/last("net.if.in[eth0,bytes]")

[ovas]

Hello registration_is_lame!

Possible indeed: last("net.if.in[eth0]",#5)/last("net.if.in[eth0]")