Not to be an ass by cutting in here, but wagering more on the Odds does nothing to reduce the probability of the bet winning or losing. Once the Pass or Come bet has traveled to a point number, you are at a disadvantage because the winning bet will pay even money...but you are up against the 7 (6 ways to roll it vs. 5, 4, or 3...depending on the point number). What the Odds bet does is pay you according to your risk (i.e. 6:5, 6:4, or 6:3, respectively). Therefore, this no-edge wager, when combined with a Pass or Come bet, dilutes that disadvantage...bringing it down towards 0%, but never really getting there.
To make a long story short, more Odds shaves away at the house's substantial edge when the Pass or Come bet travels to a point (6 or 8: ~9%, 5 or 9: 20%, 4 or 10: ~33%).
good luck