Oricon Chart for 10/8-10/14
210802 *709028 HxH
169644 *455332 Haikyuu
*63834 *160055 Boruto
*50571 *139451 Gintama
*34587 1984973 OP
*27171 **74789 Darlifra
*26040 **70037 Yuragi
*22355 *631764 Heroaca
*18517 *322520 Ruroken
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*11072 *730094 Heroaca 19
*10897 **29642 Hinomaru Sumou
**9969 *788898 Heroaca 18
**8585 *801116 Heroaca 17
The biggest thing here is HxH's drop from the previous volume
│477485 (3)│*728167│*819134│*865164│*895639┃1,002,275 (122)┃2018/02|HUNTER×HUNTER 35
│498226 (4)│*709028│-------│-------│-------┃*,709,028 (*11)┃2018/10|HUNTER×HUNTER 36
Volume 36 has an extra day over vol. 35 yet sold 19k less by the end of its 2nd week. This is a case where you can tell its a drop. We have to wait until the 4th week to see if it can recover over the next 2 weeks and get past volume 35's 4th week sales but so far its up in the air.
Weirdly enough, Haikyuu is also showing a similar pattern:
│267683 (3)│486748│558891│592529│612377┃*,612,377 (*31)┃2018/08|ハイキュー!! 33
│285688 (4)│455332│------│------│------┃*,455,332 (*11)┃2018/10|ハイキュー!! 34
It may be that this is just a week where stuff is lower. Boruto continues its downward trend. Hinomaru sumou 22 sold less than Heroaca 19 which is in its 15th week. Speaking of which, Heroaca 20 actually sold a tiny bit more in its 6th week than its 5th. It sold 22280 in its 5th whereas this past week it did 22355. It could be due to various reasons.
The end of the Oricon year is in like 5 weeks, including this week so it should be interesting to see how stuff continues to do by then.