LOL. Just started. Was going to update the OP with my initial results but somebody posted in here!

Let's say that we have a goal to lose a maximum of 15 units using this system. Here is what that looks like:

1 2 -2 1 1 L 1 bet to recover

2 4 -6 1 1 2 2 LL 2 bet to recover

3 6 -12 1 1 2 2 3 3 LLL 3 bet to recover

3 6 -18 1 1 2 2 3 3 3 3 LLLL 4 bet to recover

So let's put this into a simulator and see how often we can win 10 units versus lose 18...

Hmmm, initial runs show a win rate of 87.4% O_o

That beats the tar out of the 4 step marty with only a 55% win rate!?

Checking code for errors...

OOPS. Forgot about the zero...

Re-running...

Wow and 80.1% win rate!!!

Ok, I see I messed up the initial summary and it is 18 units lost but for an extra 3 units we gain about a 25% increase in the win rate!