Last week I received the following note from a reader: “Since I just started investing in early March 2009, and linked up with you folks shortly thereafter, I’ve been mighty lucky (too early to call my successes SKILL), and have seen my two portfolios (IRA and separate investment account) grow from $70,000 to $155,000 and from $150,000 to $200,000 respectively. “My question is about when you normally sell stocks that have done well. Do you sell when a stock’s price has advanced X% even it that means you might miss out on continuing upward movement? Instead of percentage increases,...