I remember reading about this a few years ago & the reason it's called Oscar's Grind is because it is named after the guy who developed it, which was for betting on the 'even' money shots at roulette at the casino. It is claimed that over a long period of time he won, but not sure if that is true or not.

The aim is to win just one unit then once having done so recommence @ the start.

These are the rules that I picked up elsewhere -

Rule 1: The target for each sequence of bets is one unit profit, with the first bet being one unit.

Rule 2: After a losing bet, the next bet is always the same size as the previous one.

Rule 3: After a win, the next bet is one unit more than the previous one, so long as the dividend is $2 (Evens) or longer. Where the dividend is less than $1.50, the next bet should be the same size as the previous one, while if the dividend is between $1.50 and $1.95, then the next bet should be increased by the amount of the percentage profit of the base bet, i.e. a winning bet that returned a dividend of $1.60 would mean an increase of $6 (assuming a $10 base bet) on the previous bet.

Rule 4: However, the bet size should only ever be large enough to gain an overall profit of one unit on the sequence.

So long as a sequence does not go for too long in a WLWLWL type of situation it should work fine, otherwise it can take a while to compete & I think that's where the 'grind' bit comes in.

I have tried it & it worked fine but would suggest that it be worked on paper over a set of selections to get used to it, making sure it does improve on level stakes before putting any real money down.

A stop/loss strategy would probably help doing tough periods as well.