Nikkei is testing major support at 21700 which is the 38% retracement and 61.8% extension along with a strong overlap support. Breaking this level could trigger a strong move down to 21353 ( 61.8% retracement , 100% extension, horizontal overlap support).
It's important to note that RSI has broken below our strong 50% support signalling that a potential bearish move is on the horizon.