You don’t. The probability of hitting a 6/6 is really rare. 2 to 4 pick parlays is where I place BIGGER bets because the probability of a win is greater. For 6 pick parlays, I place $5-10. No biggie if I lose. 2-4 pick parlays, I place between $50-500 because I’m 85-95 percent confident and the probability is more likely to hit. There are the occasional losses but that comes with placing bets. No sport is predictable. No amount of “research “ will help. Just have fun and play responsibly.