To simplify things, I do it on a roll by roll basis! Don't know where you play Koko, but I always see 4-5 Group 2's in a row! Sometimes more! I can tell ya one thing's for sure......Ya See two consecutive Group 1's, & ya pretty much know the roll is over. I think I'm gonna start hopping the Sevens, or laying a number when those G1's start raining down!