Netdata is a distributed, real-time, performance and health monitoring for systems and applications. It’s a perfect choice for monitoring your dd-wrt router in real-time. Netdata is already included in entware packages but you can also download and install the latest version from github here
Installing netdata with Entware
Assuming you have already installed entware as described in this post, you can install netdata by issuing the following on your ssh session :
opkg install netdata
After installation is done you can access the netdata web interface at http://<router_ip>:19999
You will find all key metrics of your dd-wrt router presented through a very nice graphical interface.