Look at the last 4-5 numbers.. Put chips surrounding each of those numbers. The bet should be somewhere between 9-13 units
For an example last numbers hit are 20, 14, 33, 30.... (always put 1 chip above, below and on each side)
Number 20; It's located in the middle column, so four chips are placed 17,23,19,21
Number 14; Also middle column, so bets are placed 13,15,11 (number 17 already 1 chip)
Number 33: First column, bets are 30,36,32
Number 30: Also first column, so bets are 27, 29, 33
OK, so that is a 13 number bet. (you can choose fewer numbers to bet, as long as bet is somewhere between 9-13 numbers)
Ignatus brother 9-13 numbers is a lot for inside bets.
Makimium is 4-6 and preferably less,if you play more than 6 numbers you must to think about the outside bets.
My friendly advice for you is to read everything on this forum, and than you will understand why yours systems can not work.
I hope you'll accept a friendly advice, it will save you time and money.