#Earnings $AMBA reports tonight. Below are details on earnings 1-day moves over the last 12 quarters.

Aug. 30, 2018 AC -3.62%
June 5, 2018 AC -12.93%
March 1, 2018 AC 13.46%
Nov. 30, 2017 AC 14.29% Biggest UP
Aug. 31, 2017 AC -22.35% Biggest DOWN
June 6, 2017 AC -10.24%
Feb. 28, 2017 AC -4.42%
Dec. 1, 2016 AC -11.27%
Sept. 1, 2016 AC -6.67%
June 2, 2016 AC 9.39%
March 3, 2016 AC -8.93%
Dec. 3, 2015 AC -1.64%

Avg (+ or -) 9.93%
Bias -3.74%, negative bias on earnings.

With stock at 34.30 the data suggests these ranges.
Based on current IV (expected move per TOS): 29.86 to 38.74
Based on AVERAGE move over last 12 quarters: 31.04 to 37.88
Based on MAXIMUM move over last 12 Q’s (22.4%): 26.76 to 42.16

Open for requests on other symbols.