LONDON Nov 18 (Reuters) - ICE sugar, cocoa and arabica coffee futures edged up on Friday, supported partly by a slightly weaker dollar but concerns about the deepening debt crisis in the euro zone helped to cap gains. SUGAR * Raw sugar futures edged up, rebounding slightly from the prior session's five-month low. * ICE March raw sugar futures rose 0.10 cent or 0.4 percent to 24.14 cents a lb by 0927 GMT. The contract dipped to 24.00 cents on Thursday, the lowest level for the front month since June 7. * New York sugar will fall further to 23.79 cents per lb, according to Reuters analyst Wang Tao. * Malaysia's cabinet is expected to approve a purchase of slightly less than three million tonnes of raw sugar in the next few weeks, a Malaysian industry source close to the deal told Reuters on Friday. * March white sugar futures on Liffe were down $2.40 or 0.4 percent at $626.60 per tonne. COCOA * ICE cocoa prices were hovering just above the prior session's 2-1/2 year low with ample supplies keeping the market on the defensive. * ICE March cocoa rose $4 to $2,509 a tonne. The contract dipped to $2,490 on Thursday, the lowest level for the second month since July 2009. * New York cocoa will fall to $2,468 per tonne, as indicated by its wave pattern and a Fibonacci projection analysis, according to Reuters market analyst Wang Tao. * Cocoa butter was traded at its lowest ratio on record in Asia, but a pick up in demand for the first half of next year could prevent prices of the key chocolate ingredient from falling further, dealers said on Friday. * Ghana's cocoa regulator Cocobod said port carriers had called off a week-long strike over pay and conditions and that exports from the world's second biggest grower could resume shortly. COFFEE * Arabica coffee futures on ICE also edged higher. * March arabica coffee futures on ICE were up 0.3 cent or 0.1 percent at $2.3640 per lb. * New York coffee will fall to $2.3020 per lb, a presumed wave "b" trough, as a rebound that started at the Nov. 1 low of $2.24 has completed, according to Reuters market analyst Wang Tao. * Dealers noted a streak of consecutive daily rises in certified stocks beginning on November 1, limited gains. * ICE certified arabica stocks rose to 1,411,344 bags as of November 17, according to exchange data. * January robusta coffee on Liffe was down $2 or 0.1 percent at $1,851 a tonne. MARKET NEWS * World stocks fell on Friday, extending an overnight slide, with renewed pressure on Spanish bonds reflecting fears the euro zone's debt crisis was spiralling out of control. * The euro inched up against the dollar on Friday as investors unwound bearish bets on the single currency to book profits ahead of the weekend, but with the euro zone debt crisis escalating, appetite to sell on upticks was high. * Brent crude held steady at $108 a barrel on Friday, after posting steep losses in the previous session on concerns over demand growth as Europe struggles to keep its debt crisis from spiralling out of control and hurting the global economy. (Reporting by Nigel Hunt)

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