Lesson Learned on Trend Reversals

As I get further in my trading course, I'm going back and identifying where I did good and what I messed up. Here's one lesson: get out when you have a confirmed trend reversal! I kept hoping it would be a short one, but you know what assuming does... As soon as the trend line turned into resistance, that's a confirmed reversal and where I should have sold my call at a loss but still kept some of the money instead of watching it reduce to $0.