This is the same discussion we've been having over at THE RACES. Level stakes is the only way to go in ANY betting situation. If you have an advantage you will always win long term and if you don't have "the edge", staking will NOT save you. I pose the same challenge as in the racing forum, as follows.
Use a roulette simulator (on-line) or go to your nearest casino. Collect thousands of numbers BUT DON'T BET. Then "pretend" the casino has MADE A SERIOUS MISTAKE and is giving you $2.20 for one of the colours (or odd/even or high/low). This will now mean YOU CAN'T LOSE if you just bet the "advantaged" colour (or whatever) AT LEVEL STAKES. Even a highly unlikely divergence from the expected 50% (it doesn't matter about the zero either), of 5 or 10 percent will STILL leave you a winner (please don't play BOTH sides). Use ANY other staking system and, sooner or later, a long run of outs will blow the bank. I guarantee it!!! You will either see your bets skyrocket, chasing losses (no limit in THIS casino) until you crash OR you will lose and lose and lose (with percentage-type staking) but NOT recover completely when you start winning as your percentage will be OF A MUCH SMALLER REMAINING BANK.
Please don't mock or scoff 'til you try this. And,remember, it's a long-term trial NOT the first flush of success we're talking about here. Cheers.
P.S. Anyone using cut-off levels like , for example "No bets under $1.30" could you explain why, since this is TOO SHORT, why you don't bet the OTHER competitor who will thus be TOO LONG??" Cheers