Thanks oldbrewer.
With the odds, the first race says odds of 4 to win 4, do you mean we win 3 + original stake 1? That would be correct.
I think we have our wires crossed and probably my fault for not being clear...
When I say original stake of 1 euro, I mean that the target profit is 1 euro, so the actual stake is always dependent on the odds.
If target profit is 1 euro and odds are 5, then our stake is 25 cents (25 x 4 to win 1 euro) so we then get 1.25 back in total.
If we'd have lost the bet we would be 25 cents down.
A normal martingale would now try to recover the 25 cents and win 1 euro.
What I want to do is recover the 25 cents + the target profit 1euro for the 1st race + win target profit 1 euro on the next race.
So if odds were again 5, the next bet would be a stake of 0.57 (rounded up) to win 2.25 (target profit 1st and present race + 25 cents running loss)
If we lost again our running loss would be 82 cents.
If next bet odds are again 5 then our stake would be 96 cents (rounded up) to win 3.82 (target profit 1 from 1st, 2nd and present race + 82 cents running loss)
Phew, I'm even confusing myself now