How to detect about IP's flow

Hi anybody…

I want to ask one question about “how to detect about IP’s flow”…

so … who does can tell me slove way~~ thank you~~

What exactly you want to detect ?

Exam:
I want to detect “192.168.1.25”. When his flow above 512k, so it can run script.
I know routeros can detect interface’s flow. But I don’t know how to detect IP’s flow.
So who does can tell me slove’s way~~thanks!!

As far as I know, you cannot detect the speed (you may detect it by different tools, but you cannot use this value at scripts).
You may set queues that have limit-at and max-limit, limit-at will be the speed user always gets (if such speed is available), max-limit is the speed that user might get in the particular circumstances.