• USD/KRW edges up to 1385.7 as it steps into bullish path

• Fri close above 1381.4 engages Bollinger uptrend channel

• But a key chart barrier just slightly above may deter buyers

• Closing above 50% retracement 1387.8 needed to clear the way

• USD/JPY rally in the wake of as-expected BOJ hike inspires longs

• S. Korea: commercial viability hinders US investment talks
KRW

(Ewen Chew is a Reuters market analyst. The views expressed are his own.)