To predict well the Roulette table what people have done to give an edge is to mark the ball as it goes...and again when it goes again...
Now we have the "trajectory" of the ball.

Then we watch the green 0 or double 0.
Mark it and mark it again.

The marking is often done by tapping your foot to trigger a switch or a trigger in a pocket. With electronics advancing there are likely new variations being developed.

The raw values are computed in some kind of strap on computer.
And the number of highest probabillity is given....
quick place the bet.

You won't be able to win at will...you can only get a slight advantage.
You need to overcome the factor of the 0 and 00 that skew the odds to the casino just a bit.

Downside is that this is cheating and you can get in trouble with some guys that like to let you know they don't like your style.

Alternatively, people have watched the tables and noted the numbers that come up.

For a Neural Network you need a lot of data.
In a casino you can stay all day and all night but you likely will not have enough data to make an advantage.

Should you start winning they will take an interest in you and any partners you may have had during the data retrival stage.

Really, Forex is a better deal.

Still I am intrigued by the ways people go after an edge.

You will still have to work with good money management as your win rate will still be low.....you will just be a bit better off.