I can't let you out of this section without telling you about a wagering
device that is frequently used by seasoned players. Think of this one
as a one-way D'Alembert, which has been blessed with a four unit ceiling.
This system calls for you to increase your bet size by one unit after
every loss until you win, or reach the four unit level. If you don't get
a win there, the series is over.
The word "system" is used rather loosely here, because this
is more a technique than a system. If played on that basis, I have no
strong objections to it. If goves you a strong chance to win, without
compelling you to mop up a huge mess when it fails (unless you can't stomach
a 10 unit loss). Now, once you reach the third stage, all you're shooting
for is to get all or most of your money back, with no hope of showing
a profit for the series. But it usually keeps you in the game, and that
counts for something.
Although it was designed for even money bets, the 1-2-3-4 can be used
for other bets, preferably those which pay somewhere between even money
and 2-1. Depending on the payoffs of the bet you're pursuing, it would
be possible to garner a profit regardless the stage you're at when the
win occurs.
Year's ago, I used this technique quite a bit. But these days, I find
that I am more conservative. I seldom chase anything for more than 2 or
3 stages, even with bets that pay 2-1. Time and seasoning have taught
me that if you don't catch something early, the prudent move is to abandon
the chase. At the next opportunity you'll get your man.