#Earnings $UAA reports tomorrow morning. Below are details on earnings one-day moves over the last 12 quarters. I chose $UAA over $UA due to higher daily volume.

Nov. 4, 2019 BO -18.92%
July 30, 2019 BO -12.24%
May 2, 2019 BO +3.53%
Feb. 12, 2019 BO +6.88%
Oct. 30, 2018 BO +27.70% Biggest UP
July 26, 2018 BO +4.55%
May 1, 2018 BO +1.52%
Feb. 13, 2018 BO +17.35%
Oct. 31, 2017 BO -23.70%
Aug. 1, 2017 BO -4.52%
April 27, 2017 BO +9.94%
Jan. 31, 2017 BO -25.74% Biggest DOWN

Avg (+ or -) 13.05%
Bias -1.14%, negative bias on earnings.

With stock at 20.70 the data suggests these ranges:
Based on current IV (expected move into Friday per TOS): 18.22 to 23.18
Based on AVERAGE one-day move over last 12 quarters: 18.00 to 23.40
Based on MAXIMUM one-day move over last 12 Q’s (27.7%): 14.97 to 26.43
Based on DOWN max only (-25.7%): 15.37

NOTE: 5-day max moves are -28.47% and +30.29%

Open to requests for other symbols.