In trading, the reps we put in are our reviews of markets, what we did, and what we could/should have done. When I worked with active traders in Chicago, I was impressed by the time they spent reviewing the past day's trade bar-by-bar in replay mode. They didn't just go over charts and whiz through their reviews. Rather, they slowed down the review, talked out loud what they were seeing bar by bar, and rehearsed making the right decisions. As I learned from my workouts at the gym, the quality of the reps determined what they took away.
A review of performance, to be effective, must be a workout.
We build our trading psychology in the course of performing and engaging in deliberate practice. We can solicit advice from others, but ultimately it's the workouts that make the winners. Jeff Holden of SMB Capital and I have been challenging developing traders to write up their daily takeaways to cement their learning. Similarly, experienced traders at the firm put together daily report cards of their trading and monthly reviews. Some of the writeups are nice summaries. Others are workouts.
The time and effort we put into our reps determine our level of fitness. Focusing on One Good Trade is what builds good trading.
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Further Reading:
What Makes an Expert Performer
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