The dollar index, which tracks the greenback against six major rivals, rose 0.16 percent to 90.200 on Tuesday, as risk appetite improved and Wall Street's main indexes advanced. The euro was down 0.25 percent to 1.2269 against the greenback. Against the yen, the dollar added 0.67 percent at 106.59. The euro is expected to meet resistance and support against the dollar at $1.2420 and $1.2100 respectively, while the dollar is expected to meet resistance and support against the yen at 108.10 and 105.20 respectively.

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