In the chart above, bets are placed at 120 units per full table bet for each spin. A win is half that at 60 units. So it takes two wins to equalize each loss. But the odds of winning are 63% for each spin on the double zero wheel. So it's very close to a balance.
If you follow trends in Roulette you know that the zeros get very active for a while, way above their average of every 17 spins. They also get very inactive, way below their average. You can stay out of the times when they are very active or you can include them in your 24 numbers selected. It all comes down to selecting when to bet the best 24 numbers in your imaginary candlestick chart.
If you target the activity of the zeros well you can flatten the odds to 66% and 2 to 1 payoff. That's just one strategy for playing the game of Roulette like a day trader.