Simple Multi-Purpose Adjusted Load Averages
loadaverage is available on the AUR as loadaverage. Use your favorite AUR-helper or install it manually.
Installation is painless.
Try:
git clone https://github.com/qguv/loadaverage.git loadaverage-git
cd loadaverage-git
python3 setup.py install --prefix=/usr/local
cd ..
rm -rf loadaverage-git
If that doesn't work, try the same thing as root.