"A weaker dollar was the reason behind today's rally," said George Gero, Vice President with RBC Capital Markets Global Futures in New York. "Copper buying continued today underpinned by possibility that the Greece problem will be solved."

"I don't think the jury is out as to whether the direction is lower or higher," said Justin Lennon, analyst with Mitsui Bussan Commodities.

"Stock changes are becoming more supportive," a trader said. "But we'll have to wait till after the Chinese holiday to see how things work out."

Closing prices for Monday:

Copper    $6,590  +$140

Aluminium $2,056   +$44

Zinc      $2,135  +$113

Lead      $2,032   +$67

Tin      $15,500  +$300

Nickel   $17,550  +$350