hi i want to know my total p2p traffic in my network. is it possible to mark and graph all p2p?

Yes you can. Just mark the P2P in firewall mangle sth like:

/ip firewall mangle
add chain=forward p2p=all-p2p action=mark-connection new-connection-mark=P2P
add chain=forward connection-mark=P2P action=mark-packet new-packet-mark=P2P

Then create a queue based on that Packet mark, and after that you can create a graph
for the queue

thanks toni