Simple trading plan that works. Okay, let's see.
Once upon a time, when I was getting into trading, my brother and I traded together. He saw that I had a tendency to get in early, anticipate reversals, and hold too long. So he took advantage of that. Whenever I'd get in with puts, he'd go long with calls. He won 4 of 5 times. The more certain I was that it was going to go one way, he'd just bet on the opposite, unless I was calm about it. If I was calm about the decision, he'd agree with me.
It worked because he always lied to me about his decisions. I didn't know he was winning. I though we were both losing. My stress was way high but I was comforted by the fact that we were both in the same boat. You should have seen me when I found out. I was partially relieved that one of us was making money, but a little angry that he was taking advantage of my stress.
Long story short, I got better and his strategy stopped working.