
You will see these three names everywhere. None of them changes the house edge, because every spin is independent. What they change is how your stakes move, and how quickly a losing run gets expensive.
Martingale
Double the stake after every loss, go back to the base stake after a win. It feels safe until a run of losses hits the table maximum or your budget: seven losses in a row starting from ₱20 already means a ₱2,560 bet.
Fibonacci
Stakes follow the sequence 1, 1, 2, 3, 5, 8, 13… Move one step up after a loss and two steps back after a win. The climb is slower than Martingale, but the logic is the same.
D’Alembert
Add one unit after a loss, take one off after a win. Gentler swings, the same edge.
If you want a system, a fixed budget per session and a fixed stake per spin is the one that actually protects your money.