First tiebreaker is total points in the overall head to head.
RPI swept Harvard and split with Q-Pac. 6 points.
Quinnipiac split with both. 4 points.
Harvard split with Quinnpiac and was swept by RPI. 2 points.
RPI wins the tiebreaker for 3rd.
Now it's a tie between Quinnipiac and Harvard for 4th. The first tiebreak is, again, points head to head, which is a tie. 2nd tiebreak is ECAC wins, which Harvard leads 11-9.
Harvard wins the tiebreaker for 4th, Quinnipiac is in 5th.
However, I should point out that Harvard has an advantage since they're playing Union this afternoon. That should be 2 easy points, which means RPI and Quinnipiac have to win their tougher games in order to keep pace. RPI plays Dartmouth, Quinnipiac plays Clarkson. We may see Q-Pac drop (but who knows, Princeton beat Clarkson last night), but Harvard still needs to have more points than RPI to be ahead of them.