LME copper falls sharply overnight, dollar recovery is trigger for mostly technical pullback, says trader; ticks up in early Friday trading. Fundamentals haven't changed, and trading activity highlights need to separate medium from short-term trading. Traders now braced for copper breaking through lower end of short-term range at $7,600/ton, but downside may be protected by bargain hunters. LME 3-month copper last trades at $7,705/ton, up $49 vs yesterday's PM kerb.