Lot of time you really miss if you have been seeding a certain torrent and you wasted a lot of bandwidth, then it is a good idea that you use a plugin which would change the colour of your ratio in Rutorrent .
First you have to log into your SSH through putty and then use the following codes which will change the colour of your ratio from normal to purple anytime you are getting over a ratio of 20.
This can definitely help you to prevent your seedbox from overseeding.
Thanks to lucabrassi for the code.
wget -qNO ~/ratio.zip http://git.io/7MNLaw
sudo unzip -qo ~/ratio.zip -d /var/www/rutorrent/plugins
rm -f ~/ratio.zip