Thanks sportz, yeah maybe there isn't a formula, as I have a fixed amount to bet on the no1 pick (varies with each bet) eg. say I have an amount to bet of $21 @ fixed odds of say 6-1, then my saver is to recover that $21 + the stake on the saver (should the saver win that is) if nether wins then the next bet is to a fixed amount + the losses on previous race etc. Now don't everyone start screaming about the dangers/stupidity of chasing losses, I know all that this is a plan full of safety measures which can only lose a small initial amount, but builds up from winnings only (hoping) for that golden run!