i believe that you are adding the risk odds rather than multiplying those against the amount "to win". eg. today as per your oak calculation you have stated that you are risking 3.4 units to win 3 units. that would mean that the odds on oak are approx -113 when the odds are really, at this time, -150. therefore, you are truly risking 4.5 units to win 3 and not 3.4 units to win 3. i hope that his helps. bol