``The Indian markets are expected to open positive on the back of positive global cues. The markets ended flat on Monday after a positive start to the trading session. The weakness in the markets was, however, not sustained and both indices ended the day flat. Markets are likely to remain cautious ahead of the winter session of Parliament as important bills are likely to be tabled. Markets are also likely to remain sensitive to political news flow regarding the no-confidence motion proposed by the Trinamool Congress. The Sensex rose 29.6 points or 0.2% to close at 18,339.0 while the Nifty ended at 5,571.4, down 2.7 points,`` said ICICIdirect.
``The Sensex has supports at 18,250 and 18,180 and resistances at 18,400 and 18,520. The Nifty spot has supports at 5,549 and 5,525 and resistances at 5,592 and 5,635.``
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