9: Learning A Trading System by Gary Bielfeldt

Learning how a trend system works and executing it for a while will teach the trader the most important concept in trading: "Cut your losses short and let your profits run."

This is simple in theory, but seasoned traders know how hard it was for them in the beginning. This is a simple, practical way to internalize a core trading concept.

Gary Bielfeldt is considered to be one of the best T-Bond futures traders of all time.

Recommended Reading: 

Market Wizards, Updated: Interviews With Top Traders

Market Wizards: Interviews with Paul Tudor Jones, The Art of Aggressive Trading and Gary Bielfeldt, Yes, They Do Trade T-Bonds in Peoria [Audiobook] [Audio CD]