#Earnings — $ROKU reports tonight. Below are details on earnings one-day moves over its entire history.

Nov. 7, 2018 AC -22.29% Biggest DOWN
Aug. 8, 2018 AC +21.31%
May 9, 2018 AC -1.71%
Feb. 21, 2018 AC -17.71%
Nov. 8, 2017 AC +54.93% Biggest UP

Avg (+ or -) 23.59%
Bias 6.91%, positive bias on earnings.

With stock at 52.00 the data suggests these ranges:
Based on current IV (expected move into Friday per TOS): 44.88 to 59.12
Based on AVERAGE move over last 12 quarters: 39.73 to 64.27
Based on MAXIMUM move over last 12 Q’s (54.9%): 23.44 to 80.56

Open to requests for other symbols.