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

Oct. 16, 2018 AC +5.95%
July 17, 2018 AC +8.78% Biggest UP
April 17, 2018 AC +4.81%
Jan. 23, 2018 AC -11.44%
Oct. 18, 2017 AC -12.07% Biggest DOWN
July 18, 2017 AC -5.90%
April 17, 2017 AC -4.26%
Jan. 17, 2017 AC +0.35%
Oct. 17, 2016 BO -0.31%
July 19, 2016 BO +0.29%
April 20, 2016 BO +0.94%
Jan. 21, 2016 BO +0.46%

Avg (+ or -) 4.63%
Bias -1.03%, negative bias on earnings.

With stock at 81.20 the data suggests these ranges:
Based on current IV (expected move into Friday per TOS): 77.15 to 85.25
Based on AVERAGE move over last 12 quarters: 77.44 to 84.96
Based on MAXIMUM move over last 12 Q’s (12.1%): 71.40 to 91.00

Open for requests on other symbols.