Stake Martingale-Stake Prediction Under-Prediction Trade-Direction Over-Prediction Martingale-Size synthetic_index random_index 1HZ10V digits overunder both 60 FALSE TRUE Stake 7 Prediction 7 Under-Prediction 7 Over-Prediction 2 Trade-Direction 9 Martingale-Size 2 Martingale-Stake Stake t 1 1 Martingale-Stake 1 Prediction win Martingale-Stake Stake Trade-Direction 9 Prediction Under-Prediction Martingale-Stake MULTIPLY 1 Martingale-Stake 1 Martingale-Size Trade-Direction 1 Prediction Over-Prediction EQ Trade-Direction 1 DIGITOVER DIGITUNDER t 1 1 Martingale-Stake 1 Prediction 7 2 7 2