Stock market old-timers will often tell newbies that “the market wants to take your money,” which, on the face of it, isn’t all that credible. After all, lots of people make lots of money on Wall Street. Still, there’s something to the warning, and the quicker you learn about it, the quicker you can start printing your yearly results in black ink, rather than red. So what can you do about it? As any of our longtime readers know, the answer is: have a system.