So just as a quick example from the card I posted above from my play last night.
The first split out was 13. (either number 25 or 28) It helps if you know quickly which split corresponds to the number which has just come out. It's easy with a bit of practice.
The second split out was 17. (either number 32 or 35)
So you would go across the top of the card to the 13 split which was the first split out and then look down that 13 split to the 17. You should see 4,10,17. So you write this down on your card and keep marking like this.
Now just suppose that I want to bet for the 4 split to come out next in any stream. All I would do is look across to the last split which came out on the top of the card. It was the 17 split. I look down that 17 split for any 4.
1,2,15. no.
2,3,12,17. no.
1,3,4,13. yes. So I bet this split which is the 3 split. (3-6)
3,4,5. yes. I bet this split which is the 4 split. (7-10)
5,6,16. no.
6,7,9. no.
7,8,9,14. no.
8,9,10,11. no.
5,9,10,13. no.
10,11,14,17. no.
7,11,12. no.
6,10,12,13. no.
1,8,13,14. no.
3,6,14,15. no.
4,8,15,16. yes. I bet this split which is the 15 split. (27-30)
2,15,16,17. no.
17,18. no.
1,11,16,18. no.
So there are only 3 splits to bet. 3-6, 7-10, 27-30.
The next split out was 15 (either number 27 or 30) and that was a win.
The 17 split to the 15 split on the card is 4,8,15,16. So the 4 split did come in one of the 4 streams.
So this is a relativey quick and easy way to record the splits of the 4 streams and also work out the bets. It's all done on the one card. You certainly have enough time to do it under live conditions when you understand what you are doing.