That's true if betting to recover 100% over 1 bet.
Very risky if bit 3 in a row which can & does happen.

What works better, is target
120%
Over 2-6 bets.

e.g.
60% x 2bts
or
40% x 3bts
or
30% x 4bts
or
24% x 5 bts
or
20% x 6bts


Using 6 cycles.

That way it makes a profit over a series of successful bets & takes into account the commission as well.

Of course the longer the bet sequence , the greater the chance of being bit again but less exposure each time we are bit.

Bet ratio 1000/1

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Cheers.