From
https://yetanothercomicsblog.blogspot.com
PRE-RIC
05/2018: Nightwing #44 -- 26,229 (+ 0.0%) [26,283]
06/2018: Nightwing #45 -- 26,242 (- 0.0%) [26,270]
07/2018: Nightwing #46 -- 26,899 (+ 2.5%) [26,931]
08/2018: Nightwing #47 -- 26,467 (- 1.8%) [26,440]
09/2018: Nightwing #48 -- 25,733 (- 2.7%)
09/2018: Nightwing #49 -- 25,475 (- 1.0%)
RIC
10/2018: Nightwing #50 -- 29,450 (+ 24.6%) [31,751]
10/2018: Nightwing #51 -- 35,026 (+ 11.4%) [35,379]
11/2018: Nightwing #52 -- 26,623 (- 24.5%) [26,705]
11/2018: Nightwing #53 -- 26,442 (+ 0.5%) [26,826]
12/2018: Nightwing #54 -- 28,269 (+ 5.4%)
12/2018: Nightwing #55 -- 26,060 (- 7.8%)
01/2019: Nightwing #56 -- 25,044 (- 3.9%)
02/2019: Nightwing #57 -- 26,845 (+ 7.2%)
03/2019: Nightwing #58 -- 25,433 (- 5.3%)
04/2019: Nightwing #59 -- 24,677 (- 3.0%)
05/2019: Nightwing #60 -- 24,233 (- 1.8%)