6/13/2016 9:35 AM $15.18
6/13/2016 9:40 AM $15.16
6/13/2016 9:45 AM $15.07
6/13/2016 9:50 AM $15.06
6/13/2016 9:55 AM $15.13
6/13/2016 10:00 AM $15.14
6/13/2016 10:05 AM $15.14
6/13/2016 10:10 AM $15.13
6/13/2016 10:15 AM $15.14
6/13/2016 10:20 AM $15.16
6/13/2016 10:25 AM $15.16
6/13/2016 10:30 AM $15.16
6/13/2016 10:35 AM $15.17
6/13/2016 10:40 AM $15.18
6/13/2016 10:45 AM $15.12
6/13/2016 10:50 AM $15.13
6/13/2016 10:55 AM $15.14
6/13/2016 11:00 AM $15.20
6/13/2016 11:05 AM $15.18
6/13/2016 11:10 AM $15.19
6/13/2016 11:15 AM $15.19
6/13/2016 11:20 AM $15.19
6/13/2016 11:25 AM $15.20
6/13/2016 11:30 AM $15.19
6/13/2016 11:35 AM $15.17
6/13/2016 11:40 AM $15.15
6/13/2016 11:45 AM $15.15
6/13/2016 11:50 AM $15.15
6/13/2016 11:55 AM $15.13
6/13/2016 12:00 PM $15.13
6/13/2016 12:05 PM $15.12
6/13/2016 12:10 PM $15.12
6/13/2016 12:15 PM $15.12
6/13/2016 12:20 PM $15.12
6/13/2016 12:25 PM $15.12
6/13/2016 12:35 PM $15.13
6/13/2016 12:40 PM $15.12
6/13/2016 12:45 PM $15.12
6/13/2016 12:50 PM $15.12
6/13/2016 12:55 PM $15.11
6/13/2016 1:05 PM $15.11
6/13/2016 1:10 PM $15.11
6/13/2016 1:15 PM $15.11
6/13/2016 1:20 PM $15.11
6/13/2016 1:25 PM $15.11
6/13/2016 1:30 PM $15.12
6/13/2016 1:35 PM $15.12
6/13/2016 1:40 PM $15.10
6/13/2016 1:45 PM $15.08
6/13/2016 1:50 PM $15.11
6/13/2016 1:55 PM $15.11
6/13/2016 2:00 PM $15.09
6/13/2016 2:05 PM $15.10
6/13/2016 2:10 PM $15.10
6/13/2016 2:15 PM $15.10
6/13/2016 2:20 PM $15.10
6/13/2016 2:25 PM $15.09
6/13/2016 2:35 PM $15.10
6/13/2016 2:40 PM $15.12
6/13/2016 2:45 PM $15.12
6/13/2016 2:50 PM $15.14
6/13/2016 2:55 PM $15.12
6/13/2016 3:00 PM $15.12
6/13/2016 3:05 PM $15.11
6/13/2016 3:10 PM $15.11
6/13/2016 3:15 PM $15.09
6/13/2016 3:20 PM $15.09
6/13/2016 3:25 PM $15.09
6/13/2016 3:30 PM $15.08
6/13/2016 3:35 PM $15.08
6/13/2016 3:40 PM $15.07
6/13/2016 3:45 PM $15.05
6/13/2016 3:50 PM $15.05
6/13/2016 3:55 PM $15.05
6/13/2016 4:00 PM $15.05
6/20/2016 9:35 AM $16.31
6/20/2016 9:40 AM $16.35
6/20/2016 9:45 AM $16.34
6/20/2016 9:50 AM $16.37
6/20/2016 9:55 AM $16.36
6/20/2016 10:00 AM $16.34
6/20/2016 10:05 AM $16.34
6/20/2016 10:10 AM $16.38
6/20/2016 10:15 AM $16.38
6/20/2016 10:20 AM $16.38
6/20/2016 10:25 AM $16.39
6/20/2016 10:30 AM $16.37
6/20/2016 10:35 AM $16.36
6/20/2016 10:40 AM $16.36
6/20/2016 10:45 AM $16.37
6/20/2016 10:50 AM $16.36
6/20/2016 10:55 AM $16.40
6/20/2016 11:00 AM $16.39
6/20/2016 11:05 AM $16.38
6/20/2016 11:10 AM $16.38
6/20/2016 11:15 AM $16.38
6/20/2016 11:20 AM $16.38
6/20/2016 11:25 AM $16.38
6/20/2016 11:30 AM $16.42
6/20/2016 11:35 AM $16.42
6/20/2016 11:40 AM $16.41
6/20/2016 11:45 AM $16.41
6/20/2016 11:50 AM $16.41
6/20/2016 11:55 AM $16.40
6/20/2016 12:00 PM $16.39
6/20/2016 12:05 PM $16.41
6/20/2016 12:10 PM $16.41
6/20/2016 12:15 PM $16.40
6/20/2016 12:20 PM $16.40
6/20/2016 12:25 PM $16.39
6/20/2016 12:30 PM $16.39
6/20/2016 12:35 PM $16.38
6/20/2016 12:40 PM $16.38
6/20/2016 12:45 PM $16.39
6/20/2016 12:50 PM $16.38
6/20/2016 12:55 PM $16.40
6/20/2016 1:00 PM $16.40
6/20/2016 1:10 PM $16.41
6/20/2016 1:15 PM $16.40
6/20/2016 1:20 PM $16.38
6/20/2016 1:25 PM $16.37
6/20/2016 1:30 PM $16.38
6/20/2016 1:35 PM $16.37
6/20/2016 1:40 PM $16.38
6/20/2016 1:45 PM $16.38
6/20/2016 1:50 PM $16.39
6/20/2016 1:55 PM $16.39
6/20/2016 2:00 PM $16.38
6/20/2016 2:05 PM $16.37
6/20/2016 2:10 PM $16.37
6/20/2016 2:15 PM $16.36
6/20/2016 2:20 PM $16.36
6/20/2016 2:25 PM $16.35
6/20/2016 2:30 PM $16.35
6/20/2016 2:35 PM $16.35
6/20/2016 2:40 PM $16.35
6/20/2016 2:45 PM $16.35
6/20/2016 2:50 PM $16.35
6/20/2016 2:55 PM $16.36
6/20/2016 3:00 PM $16.36
6/20/2016 3:05 PM $16.36
6/20/2016 3:10 PM $16.35
6/20/2016 3:15 PM $16.33
6/20/2016 3:20 PM $16.32
6/20/2016 3:25 PM $16.32
6/20/2016 3:30 PM $16.32
6/20/2016 3:35 PM $16.32
6/20/2016 3:40 PM $16.31
6/20/2016 3:45 PM $16.31
6/20/2016 3:50 PM $16.30
6/20/2016 3:55 PM $16.30
6/20/2016 4:00 PM $16.30

Sorry about the columns being too close. A is Date, B is time, and C is Amount. I'd like Column D to have an x in it if the adjacent data in Column C is within the Top 30% of value for the date.