I came up with mr martingale chase for nhl.
rules are as follows
bet against teams after winning 2 favorites in a row wait till the next game where there favored and bet against them. chase up to six times when there favored. don't bet against a team if at the beginning of a chase the team is in the top 3 rpi.
I'm using the same progression as recommended by mr martingale
Bet 1 = U
Bet 2 = U(2.1)1 = 2.1U
Bet 3 = U(2.1)2 = 4.41U
Bet 4 = U(2.1)3 = 9.26U
Bet 5 = U(2.1)4 = 19.45U
Bet 6 = U(2.1)5 = 40.84U