1. The trader who doesn’t like to share ideas and strategies with others because they actually believe their techniques are so special that they will lose their “edge” if they share. seriously. 
2. The trader who fades every gap
3. The trader who trades every gap for a continuation
4. The trader who thinks that reviewing your important trades is “second guessing” or “monday morning quarter backing”. seriously.
5. The trader who thinks that there is some vast conspiracy against every position they are in
6. The trader who bangs, curses and screams 
7. The trader who rips up thousands short a stock after missing a 3 day 15% decline. i.e. NFLX
8. The trader who gets short a stock the day every momo hedge fund is buying because you believe the company’s business model is flawed. i.e. BBY
9. The trader who leaves early on a quiet day and is shocked to learn that a large biotech received a drug approval and you missed a 20% move. i.e. BIIB

Steven Spencer is the co-founder of SMB Capital and SMB University and has traded professionally for 17 years. His email is [email protected].

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