#Earnings $FFIV reports tonight. Below are details on earnings one-day moves over the last 12 quarters.

April 24, 2019 AC -1.08%
Jan. 23, 2019 AC -2.22%
Oct. 24, 2018 AC +6.10%
July 25, 2018 AC +1.07%
April 25, 2018 AC +0.89%
Jan. 24, 2018 AC -5.05%
Oct. 25, 2017 AC +3.97%
July 26, 2017 AC -7.16%
April 26, 2017 AC -7.50%
Jan. 25, 2017 AC -8.25% Biggest DOWN
Oct. 26, 2016 AC +9.57% Biggest UP
July 20, 2016 AC +0.32%

Avg (+ or -) 4.43%
Bias -0.78%, small negative bias on earnings.

With stock at 147.50 the data suggests these ranges:
Based on current IV (expected move into Friday per TOS): 140.38 to 154.62
Based on AVERAGE one-day move over last 12 quarters: 140.96 to 154.04
Based on MAXIMUM one-day move over last 12 Q’s (9.6%): 133.38 to 161.62
Based on DOWN Max only (-8.3%): 135.33

Open to requests for other symbols.