GBPJPY short: two targets in sight

I'm short GBPJPY, target 1 is 177.80 and target 2 172.75.
I'll trail to break even+5 after 40 pips down and take it from there.
Relative strength shows a stronger Yen, vs a weakening Pound Sterling.
Correlation with the SPY is strong, so it's a good idea to watch that chart, since it normally leads this one.