This is a common progression that it is an algorithm for playing roulette in online casinos and real institutions.
1–3–2–4 – equal odds betting system on roulette
The strategy is designed for four wins in a row. At each in a successful spin, the bet at stake must be changed according to the numbers in sequences: one coin, three coins, two coins, four coins.
After a failed spin or completion of a progression bet up to one coin is discarded.
The system is suitable for some other gambling games with the payout ratio is 1:1.