** Shares of online travel agency Tripadvisor TRIP.O rise 1.7% to $18 premarket
** Co reports Q4 rev of $411 mln, compared to average analysts' estimate of $400 mln, according to data compiled by LSEG
** Posts Q4 adjusted profit of 30 cents/shr, above estimate of 21 cents/shr
** Three of 18 brokerages rate the stock "buy" or higher, 10 "hold" and five "sell" or lower; their median PT is $17 - LSEG
** Up to Wednesday's close, shares gained 20% YTD
(Reporting by Sanchayaita Roy in Bengaluru)
((sanchayaita.roy@thomsonreuters.com))