gitty44,
slugz67 explained it well, but moreso than a system being complicated, it can be a paperwork nightmare to track properly. If you don't keep the system in a spreadsheet tracking the plays within the system, you will never have a true idea whether the system works and more importantly is profitable. You will only have a vague notion whether it works or not and you will without a doubt be setting yourself up for disaster. I believe in systems, yet mine are mostly done with teasers and waiting for the next opportunity after the system doesn't win, and doubling up thereafter. I have done very well with Teasers, but most bettors think they are for fools. I think it takes out a lot of point shaving, having to shop around for the 1/2 pt better lines, etc. Here is a system I am tracking now:
a 4 team 13 pt teaser: 100 to win ~83. (It even, "even" money, but an 83% return on your money that you will never find in the stock market.)
2 best ranked hm favorites in CFB closest to -13, and 2 highest favored NFL plays.
This week, those plays are probably:
Fresno+0.5
Tenn-0.5
and
TB+2
PIT+3.5
But as I say this and other systems will always lose at times, so if you create a system that is quite strong, and play only after it loses once or perhaps two times consecutively, keeping your per play amount reasonable (good money management), and doubling up or writing off loss, hopefully other plays/systems kept you in the black week in week out, you should have decent success. But there is definitely a time commitment, so it better show that that the time spent is worth the $ return, otherwise you will lose more than just money, but time, family and friends so tread extremely carefully...
Best of luck to you.:toast: