#Earnings $DLTR reports tomorrow morning. Below are details on earnings 1-day moves over the last 12 quarters.

Aug. 30, 2018 BO -15.54% Biggest DOWN
May 31, 2018 BO -14.28%
March 7, 2018 BO -14.47%
Nov. 21, 2017 BO 2.41%
Aug. 24, 2017 BO 5.62%
May 25, 2017 BO 0.92%
March 1, 2017 BO 0.20%
Nov. 22, 2016 BO 8.15%
Aug. 25, 2016 BO -9.93%
May 26, 2016 BO 12.77% Biggest UP
March 1, 2016 BO 2.21%
Nov. 24, 2015 BO 6.62%

Avg (+ or -) 7.76%
Bias -1.28%, negative bias on earnings.

With stock at 83.30 the data suggests these ranges.
Based on current IV (expected move per TOS): 77.28 to 89.32
Based on AVERAGE move over last 12 quarters: 75.64 to 88.36
Based on MAXIMUM move over last 12 Q’s (15.5%): 69.26 to 94.74

Open for requests on other symbols.