* Euro supported by Greek deal hopes, short-covering * Resistance seen near 100-day moving average around $1.3333 * Dollar-index at 2-mth low; Aussie hits 6-mth high By Nia Williams LONDON, Feb 8 (Reuters) - The euro rose to a two-month high versus the dollar on Wednesday, as short positions were trimmed on optimism Greek leaders are nearing a deal on measures to secure second bailout and avoid a messy default, despite slow progress in talks. Following a string of delays in negotiations, Greek leaders will meet again on Wednesday in a bid to strike a deal on painful austerity steps in return for another international rescue package, Analysts said the euro could test $1.33 and push as high as $1.35 if a deal is finalised. A sharp selloff in the single currency was seen as unlikely even if talks drag on for another day, given sizeable euro short positions that investors are reluctant to add to before knowing the outcome of the negotiations. The euro rose to $1.3289, its highest level since Dec. 12. Topside resistance came in at the 100-day moving average around $1.3333, while option-related offers were reported ahead of $1.3300. "There has been a propensity by the market in general to look at the Greek scenario with a glass-half-full approach, irrespective of the deadlines Greece has missed," said Jane Foley, senior currency analyst at Rabobank. "I think positioning has a significant part to play. Although shorts are off their record levels, they are still really extreme and people do not want to get caught in a rally." The latest positioning data showed currency speculators trimmed euro short positions to 157,546 contracts, down from a record 171,347 contracts the previous week. Euro resilience was also down to the European Central Bank's provision of low-rate long-term funds to banks that ensured ample liquidity in the banking system and was helping to prop up risk appetite, Foley said. The bank holds another three-year tender at the end of February. Some strategists said euro upside was limited as many short positions had already been covered on Tuesday when the euro posted its strongest daily gain since November. It climbed from below $1.30 to $1.3270 on talk a Greek deal was imminent. Morgan Stanley strategists said they established a short euro position at $1.3250 and are targeting $1.2390 with a stop at $1.3350, given the structural problems still facing the euro zone even if Greece gets a second bailout. "If we see a deal being signed it's going to be euro positive, but that's already priced in. It's going to be tricky trying to pick the top but a rebound is going to fairly limited and short-lived," said Morgan Stanley strategist Ian Stannard. "The broader problems within the euro zone are going to be even harder to tackle." YEN RETREATS The euro also hit a seven-week peak of 102.449 against the yen, gaining strength on reported stop-loss buying. The yen retreated broadly on the crosses, with traders saying the technical outlook for cross/yen pairs had improved after their recent breach of some technical resistance levels. Stop-loss dollar buying, coupled with dollar buying by Japanese importers and offshore players, also helped to lift the greenback against the yen, traders said. It rose 0.3 percent to 77.06 yen, pulling away from a three-month low of 76.027 yen hit last week. Earlier on Wednesday, the yen showed little reaction to data showing that Japan's current account surplus shrank sharply to a 15-year low in 2011. Better risk appetite and hopes Greece is close to agreeing austerity measures helped to boost commodity currencies. The Australian dollar rose to a six-month high of $1.0845. Broad dollar weakness pushed the greenback to 78.443 against a basket of currencies, its lowest level in around two months.

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