Gain in European markets and rise in Asian indices trend in the present trades could move up the local indices in early trades. Although the bias remains positive, investors should maintain caution as profit taking at higher levels may pull down the market. Among the local indices the Nifty could test 5000 on the downside while on the upper side it may move up to 5300. The Sensex has a likely support at 17000 and may face resistance at 18200.