Alerts Bandwith

Hello,

I am new on Solarwinds so i want to know how to send and alert when a bandwith of a internet link have reached more than 155Mps.

I have started configuration but i am not able to include on the email's alert the Current Thoughput of the link.

Exemple:

When i have more than 155Mps, the email tell me: "You have reached more than 155Mps, your current thoughput is 215Mps".

I tried to insert a variable but i don't know which one is good.