Although dollar has retreated from yesterday's high at 108.62 due to cross unwinding in yen, a firm break below 107.54 (previous resistance) is needed to signal temporary top has been formed and bring correction of recent upmove towards 106.9.  
Above 108.35/40 would yield re-test of aforesaid resistance 108.62 and breach there would extend the rise from last month's low at 104.95 to 108.90/00.