You have 5 bets in your bet slip. Let's call them A, B, C, D, E respectively. You can make 1 parlay for all 5 bets (ABCDE). To do so, you just need to enter your bet size next to the "5 folds".
Or you can make 5 different parlays, each with 4 bets (ABCD, ABCE, ABDE, ACDE, BCDE). Since you will make 5 different parlays this way, you will see a "5x" next to "4 folds", meaning that your total stake would be 5x of your stake on each of the parlays.
Or you can make 10 different parlays, each with 3 bets (ABC, ABD, ABE, ACD, ACE, ADE, BCD, BCE, BDE, CDE). Since you will make 10 different parlays, you will see a "10x".
I see, up until now I only played the normal parlay, this is very interesting.
Now if I choose the 4 folds or the Trebles, does it still works as the normal parlay, I have to win all the bets to win or is something different?
Yes you will need to win all the bets in one parlay to win that particular parlay.
Say for example, if you choose the "4 folds", you would be making 5 parlays, each with 4 bets. So if all the 5 bets A, B, C, D, E win, you will win all the 5 parlays. But if A, B, C, D win while E loses, you will win 1 parlay (ABCD) and lose the other 4 parlays, and hence you will still get something back instead of a big zero.
Your answer is great, I didn't know what does trebles and X-1 folds mean, I only bet on X folds which i select X games in a parlay, now i can fully understand this rule here, and it is an innovative thing, cause i never seen this thing in other sportsbooks.