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

May 21, 2020 AC +12.73%
March 4, 2020 AC -9.10% Biggest DOWN
Nov. 21, 2019 AC +10.76%
Aug. 21, 2019 AC -7.83%
May 23, 2019 AC -7.32%
Feb. 28, 2019 AC -0.90%
Nov. 29, 2018 AC +9.93%
Aug. 23, 2018 AC +14.81%
May 24, 2018 AC -5.20%
March 1, 2018 AC +9.26%
Nov. 16, 2017 AC +17.89% Biggest UP
Aug. 24, 2017 AC +8.47%

Avg (+ or -) 9.52%
Bias 4.46%, strong positive bias on earnings.

With stock at 215.00 the data suggests these ranges:
Based on current IV (expected move into Friday per TOS): 197.02 to 232.98 (+/- 8.4%)
Based on AVERAGE one-day move over last 12 quarters: 194.54 to 235.46
Based on MAXIMUM one-day move over last 12 Q’s (17.9%): 176.54 to 253.46
Based on DOWN max only (-9.1%): 195.44

Open to requests for other symbols.