19+ only. Stake is not available in Ontario, the UK, the US, Australia and other countries. Full list.
Chart: bankroll paths for 40 of the simulated players. Every strategy has the same expected loss, 1% of total wagering; the strategies differ only in how that loss is distributed between many small losses and a few catastrophic ones.
Run flat bets at 49.5% and note the busts and the median result. Switch to martingale with the same settings: the median improves (most players finish slightly up) while the bust rate jumps and the average finishing bankroll drops. That is the whole story of "systems": they move outcomes around, they do not move the average, and the average is minus 1% of everything you wagered. The simulator uses a fair random generator, not Stake's provably fair seeds, but the multiplier formula and edge are the same.
Multiplier = 99 ÷ win chance in percent. At 49.5% the payout is 2x; at 10% it is 9.9x. The missing 1% is the house edge.
It raises the share of sessions that finish slightly up while raising the bust rate; the average result stays at minus 1% of total wagering. It does not change the edge.
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19+ (18+ in AB, MB, QC). Not for Ontario, the UK, the US, Australia or any restricted country. Gambling has a house edge; set a number before you deposit and stop at it.