There is not a single betting strategy for any system. The bettting strategy will be based on:
-The game you are playing (number of decks, rules, penetration, etc.)
-The spread you think you can get away with in a particular casino
-The table minimum/maximum of that casino
-Your playing strategy (Wonging in/out, play-all, etc.)
-The size of your bankroll
-Your desired level of risk
There's probably a few things I'm forgetting too. Most BJ books and websites discuss betting strategies and there are several great rescources here as well:
http://www.blackjackinfo.com/bb/showthread.php?t=697
The topic of optimal betting (Kelly betting, proportional betting, whatever you want to call it) is a very broad subject but the links above should give you a good start with the basics. Also, doing a search of this website should bring up a few good hits.
-Sonny-