50% Retracements & USDJPY

Sharp yen gains overnight were largely the result of the Bank of Japan's offers to buy JGBs as part of its yield-targeting strategy.  After falling by nearly 200 pips, USDJPY recovered the 112 handle.  Having closed last week above the 50% retracement of the decline from the June 2015 high to the June 2016 low, will the rebound continue?   Here are the 4 cases when USDJPY retraced 50% following a decline of 20-30% following a cyclical peak:

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1) June 2007 to Mar 2008: -22% USDJPY fell more than 20% from June 2007 high to Mar 2008 low, rebounding more than 50% to Aug 2008, and staying above the retracement for 3 weeks before crashing down over the subsequent 2 years.

2) Feb 2002 to Jan 2005: -25% USDJPY fell 25%, retraced more than  50% in  Dec 2005, where it held for 4 weeks before dropping 10%.

3) Aug 1998 to Dec 1999: -31% USDJPY fell more than 30%, retraced a little over 50% in Mar 2001, but lasting 1 week above the retracement before later falling 8%.

4) Apr 1990 to Oct 1990: -23% USDJPY fell 23% then retraced exactly 50%, peaking out in March 1991, before falling 14%.

So what will it be this time? Does the Trump USD-Yields rally propel USD above 115 and onto 118s, or will it 115 mark another barrier above the 50% retracement before triggering fresh selling?   A new Premium trade in USDJPY has been posted with detailed charts and rationale.