Lucci-app-statistics graph scaling

Is there an option that when set in /etc/config/luci_statistics adjusts the scaling on graphs? I’d like to examine the standard deviation of the graph ‘ICMP Standard Deviation’ in the Ping tab.

Currently the line appears flat. I am able to calculate standard deviation by hand using the formula sqrt(sigma[x-xbar]^2/n-1) but if the option exists to scale the ICMP Standard Deviation graph so that the flat line exhibit some variation, I’ll take that!

I just noticed that on my R7800 (IPQ806x ARM processors), the standard deviation is calculated and non-zero on my ping graphs.
But on my other routers with IPQ40xx ARM processors (Linksys MR8300, GL.iNET GL-B2200), the standard deviation average and last values are zero.

I wonder if there's something missing in the mathematics runtime libraries, or in hardware support, on the IPQ40xx series?