Dominant hedge fund in LME aluminum market exits its aluminum position, likely on expectation of lower prices in coming months, also on mounting financial losses, says HARBOR Intelligence; adds, liquidation of its position could be bearish for aluminum in medium-term. Notes aluminum's short-term outlook biased to upside, as next 2 weeks are seasonally bullish, cautions some speculators may bet on higher prices for start of May, could lead to sharp pullback by end-May, June; also, copper's possible breakout above $8,000/ton would give enough upward strength to aluminum to push it above its recent resistance at $2,875/ton. LME 3-month aluminum up $1 on London Friday PM kerb at $2,855/ton.