i have a system thats really dull and hasnt worked too well.,
basically start on a low spot and when you have lost the max amount you can win on that spot , up the spot bet to next one.
here it works like this
spot 2 = 12
spot 3 = 32
spot 4 = 120
spot 5 = 500
spot 6 = 1300
spot 7 = 8000
i actually took 10 years to get to the spot 7 level, and just over a year ago hit 6 out of 6, for a $1300 win. im still down around $650 losses, so should be playing spot 6's still, but i like 5 cuz its easier to win.
my method is to count loses, and take off any winnings, unless i get back to a positive result, then i reset the game and start at spot 2 again.
i had many resets in early years, unril that 1 fateful time i didnt win anything big for 10 years.
anyhow i didnt say it was a great system, but it does help with my understanding am i ahead or down.