NEW YORK, Oct 21 (Reuters) - U.S. crude futures fell on Tuesday as economic concerns hit global equities, fueling concerns about more oil demand being curbed even as Friday's OPEC meeting and an expected output cut loomed. Tuesday's expiration of the NYMEX front-month November contract was expected to provide some volatility and the dollar's broad rally also helped put pressure on oil futures. "Crude and products futures slipped ... as traders head to the sidelines ahead of today's expiration of the November NYMEX contract and Friday's OPEC meeting in Vienna," Addison Armstrong, analyst at Tradition Energy, wrote in a note. "Crude futures are also coming under pressure from a surge in the dollar." "I don't think there will be too many traders that will want to be short in front of the upcoming OPEC meeting ... but, having said this, I have great difficulty in visualizing how the cartel can come up with cuts totaling at least 2 million barrels per day, even if it's in two stages," said Nauman Barakat, senior vice president at Macquarie Futures USA. PRICES * On the New York Mercantile Exchange at 9:58 a.m. EDT (1358 GMT), November crude CLX8 was down $2.99, or 4.03 percent, at $71.26 a barrel, trading from $71.00 to $75.69. * In London, December Brent LCOZ8 was down $2.93, or 4.07 percent, at $69.10 a barrel, trading from $68.85 to $73.29. * NYMEX November RBOB RBX8 fell 4.12 cents, or 2.4 percent, to $1.6789 a gallon, trading from $1.6450 to $1.75. * NYMEX November heating oil HOX8 fell 5.07 cents, or 2.29 percent, to $2.1592 a gallon, trading $2.1543 to $2.2578. * The heating oil crack spread <0#CL-HO=R> was at $19.67 a barrel, and the RBOB crack spread <0#RB-CL=R> was in negative territory at minus 69 cents. TECHNICALS NYMEX crude 10-day/20-day moving average: $77.73/$87.96 Technical support/resistance: NYMEX crude: $70.00/$76.00 NYMEX heating oil: $1.9875/$2.2975 NYMEX RBOB: $1.5820/$1.8615 For a report on oil market technicals click [ID:nLL124323] MARKET NEWS * Iran's oil minister said on Tuesday a demand drop could push OPEC to cut output by 2 million to 2.5 million bpd and said falling prices would hurt consumers by damaging investment. [ID:nBLA131347] * Russia "will stick to the formula of bilateral strategic partnership between Russia and OPEC," Russia's energy minister said on Tuesday. [ID:nLL196958] * OPEC seaborne exports, excluding Ecuador, fell 900,000 bpd in the four weeks to Oct. 5, with Gulf producers accounting for most of the cut, Lloyd's Marine Intelligence Unit said. [ID:nLL153781] * The dollar staged a broad rally to hit a 1-1/2-year high against a basket of currencies. [USD/] * World stocks stumbled in the attempt to put in gains for the third day in a row on Tuesday. [MKTS/GLOB] * U.S. weekly oil inventory data Wednesday expected to show crude and products supplies rose last week, according to a preliminary analyst survey on Monday. [EIA/S] * FACTBOX-OPEC comments ahead of Oct. 24 meeting [ID:nLJ88858] * For a list of top energy news stories, click [TOP/O] (Reporting by Robert Gibbons; Editing by Walter Bagley)

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