You're Right!
Even though the stock did trade down to 11, it still traded high enough to add an X. This is very important to keep in mind while charting. You must always stay within the column you started.
Continue with the next trading day.
15.5
15.0
14.5
14.0                           X 
13.5 O   *                     X       
13.0 O ----* ------------------X 
12.5 O       *                 X 
12.0 O X ------* --------------X 
11.5 O X O       *     X       X 
11.0 O X O X ------* --X O X --X 
10.5 O X O X O       * 7 O 8 O X  
10.0 O X O X O X ------X O X O X --
9.5  O X O X O X O X   X O X O X  
9.0  O X O X 5 X O X O X O --O * --
8.5  O X 4 X O X O 6 O X   * *   
8.0  O --O X O * O X O X * --------
7.5      O * *   O X O *      
7.0  --* * ------O --* ------------

Back to the exercises beginning