Don't Risk Your Gambling Money
There is no need to risk your gambling money while you're testing. Go to an online casino and play for free, or, in a live casino, stand near a table with pen and note pad, record a series of consecutive spins, and then see how you would have done, had you been playing.
The Internet is flooded with ads for roulette systems. They all claim that you'll "win consistently" when you play roulette. Most of these systems sell for anywhere from $200 to several thousand dollars. Do they work? Do you get your money back if it turns out they don't work? I doubt it.
And don't spend big bucks. Just because information is high-priced doesn't guarantee it'll make you a better player or a bigger winner.