What do you mean by exact parameters? If you mean the exact number of positions/lenghts gained, I really dont think it is necessary or even wise to think so rigidly. For me a powermove is a move where horse gains multiple positions and preferably tries to win, for example 1c-2c 9->6 vs. 5->2, both gained 2 positions but I like the latter better, of course pace is important too. Everything depends on everything, there are no easy and fast rules
