Hello,
In the last version the optional parameter of cpugraph '' -l " does not work any more...
Thankfully Mika.
I can confirm this issue, the -l flag seems to have no effect at all
Issue supposedly partially finished at this time.

conky.config = {
out_to_x=true,
own_window=true,
own_window_colour='272B35',
out_to_console=false,
}
conky.text = [[
CPU1 ${cpu cpu1}% ${alignr}CPU7 ${cpu cpu7}%
${cpugraph cpu1 25,97 00ff00 ff0000 -t}${alignr}${cpugraph cpu7 25,97 00ff00 ff0000 -t}
CPU2 ${cpu cpu2}% ${alignr}CPU8 ${cpu cpu8}%
${cpugraph cpu2 25,97 00ff00 ff0000 -t} ${alignr}${cpugraph cpu8 25,97 00ff00 ff0000 -t}
CPU3 ${cpu cpu3}% ${alignr}CPU9 ${cpu cpu9}%
${cpugraph cpu3 25,97 00ff00 ff0000 -t} ${alignr}${cpugraph cpu9 25,97 00ff00 ff0000 -t}
CPU4 ${cpu cpu4}% ${alignr}CPU10 ${cpu cpu10}%
${cpugraph cpu4 25,97 00ff00 ff0000 -t} ${alignr}${cpugraph cpu10 25,97 00ff00 ff0000 -t}
CPU5 ${cpu cpu5}% ${alignr}CPU11 ${cpu cpu11}%
${cpugraph cpu5 25,97 00ff00 ff0000 -t} ${alignr}${cpugraph cpu11 25,97 00ff00 ff0000 -t}
CPU6 ${cpu cpu6}% ${alignr}CPU12 ${cpu cpu12}%
${color red}${hr}${color}
CPU1 ${cpu cpu1}% ${alignr}CPU7 ${cpu cpu7}%
${cpugraph cpu1 25,97 00ff00 ff0000 -l}${alignr}${cpugraph cpu7 25,97 00ff00 ff0000 -l}
CPU2 ${cpu cpu2}% ${alignr}CPU8 ${cpu cpu8}%
${cpugraph cpu2 25,97 00ff00 ff0000 -l} ${alignr}${cpugraph cpu8 25,97 00ff00 ff0000 -l}
CPU3 ${cpu cpu3}% ${alignr}CPU9 ${cpu cpu9}%
${cpugraph cpu3 25,97 00ff00 ff0000 -l} ${alignr}${cpugraph cpu9 25,97 00ff00 ff0000 -l}
CPU4 ${cpu cpu4}% ${alignr}CPU10 ${cpu cpu10}%
${cpugraph cpu4 25,97 00ff00 ff0000 -l} ${alignr}${cpugraph cpu10 25,97 00ff00 ff0000 -l}
CPU5 ${cpu cpu5}% ${alignr}CPU11 ${cpu cpu11}%
${cpugraph cpu5 25,97 00ff00 ff0000 -l} ${alignr}${cpugraph cpu11 25,97 00ff00 ff0000 -l}
CPU6 ${cpu cpu6}% ${alignr}CPU12 ${cpu cpu12}%
${cpugraph cpu6 25,97 00ff00 ff0000 -l} ${alignr}${cpugraph cpu12 25,97 00ff00 ff0000 -l}
${color orange}${hr}${color}
CPU1 ${cpu cpu1}% ${alignr}CPU7 ${cpu cpu7}%
${cpugraph cpu1 25,97 00ff00 ff0000 -t -l}${alignr}${cpugraph cpu7 25,97 00ff00 ff0000 -t -l}
CPU2 ${cpu cpu2}% ${alignr}CPU8 ${cpu cpu8}%
${cpugraph cpu2 25,97 00ff00 ff0000 -t -l} ${alignr}${cpugraph cpu8 25,97 00ff00 ff0000 -t -l}
CPU3 ${cpu cpu3}% ${alignr}CPU9 ${cpu cpu9}%
${cpugraph cpu3 25,97 00ff00 ff0000 -t -l} ${alignr}${cpugraph cpu9 25,97 00ff00 ff0000 -t -l}
CPU4 ${cpu cpu4}% ${alignr}CPU10 ${cpu cpu10}%
${cpugraph cpu4 25,97 00ff00 ff0000 -t -l} ${alignr}${cpugraph cpu10 25,97 00ff00 ff0000 -t -l}
CPU5 ${cpu cpu5}% ${alignr}CPU11 ${cpu cpu11}%
${cpugraph cpu5 25,97 00ff00 ff0000 -t -l} ${alignr}${cpugraph cpu11 25,97 00ff00 ff0000 -t -l}
CPU6 ${cpu cpu6}% ${alignr}CPU12 ${cpu cpu12}%
${cpugraph cpu6 25,97 00ff00 ff0000 -t -l} ${alignr}${cpugraph cpu12 25,97 00ff00 ff0000 -t -l}
]]
@su8 All three cpugraphs came out different due to -t, -l, and -t -l flags. Everything seems to be working okay, I figure nothing is better than checking codes. The guy who made the PR said it was partially completed so I don't know where we stand here. If you can't find anything wrong, then maybe it is good enough... Still, I think @brndnmtthws should sign off on this first.

HI friends. @su8 and I tested this last month. You can see the differences between all three switches, eg (-l, -t, and -l -t) in our screenshots therefore we know the switches are working okay.
If you find the code behind the logarithmic scale or temperature gradient to be incorrect, please leave a comment explaining why and if possible, to make a pull request too to correct this behavior. Thank you.
Most helpful comment
HI friends. @su8 and I tested this last month. You can see the differences between all three switches, eg (
-l,-t, and-l -t) in our screenshots therefore we know the switches are working okay.If you find the code behind the logarithmic scale or temperature gradient to be incorrect, please leave a comment explaining why and if possible, to make a pull request too to correct this behavior. Thank you.