* Brent crude oil rises to $85.75/bbl
* A close over $85.46 is likely to spur another big rise
* $85.46 is 61.8% drop from 2012's peak at $128.40
* 2021 peak is $86.70, 2018 high $86.74 at risk
* $92.17 is the trigger point for a rally towards 2014's $115.71 high
* Oil's rise to weigh JPY
* Robust risk appetite impacts
(Jeremy Boulton is a Reuters market analyst. The views expressed are his own) ((jeremy.boulton@thomsonreuters.com))
