ISRG earnings analysis

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

Oct. 17, 2019 AC +6.96%
July 18, 2019 AC -1.45%
April 18, 2019 AC -7.00% Biggest DOWN
Jan. 24, 2019 AC -3.93%
Oct. 18, 2018 AC -3.45%
July 19, 2018 AC -0.86%
April 17, 2018 AC +8.17% Biggest UP
Jan. 25, 2018 AC -2.12%
Oct. 19, 2017 AC +3.39%
July 20, 2017 AC -4.55%
April 18, 2017 AC +6.36%
Jan. 24, 2017 AC +5.09%

Avg (+ or -) 4.44%
Bias 0.55%, positive bias on earnings.

With stock at 612.50 the data suggests these ranges:
Based on current IV (expected move into Friday per TOS): 594.19 to 630.81
Based on AVERAGE one-day move over last 12 quarters: 585.28 to 639.72
Based on MAXIMUM one-day move over last 12 Q’s (8.2%): 562.46 to 662.54
Based on DOWN max only (-7.0%): 569.63

Open to requests for other symbols.