The index has shown some strenght and Nifty tends to open gap-up and stay positive for the short term sessoin. However, Nifty bank has weekness and to plan trade for wednesday, traders should create bullish call with a covered hedge for suddern change in market direction. On sustaining 17800 level the market will test 17866 and make take a pull back before next move. 

There is a golden cross over of 50 dma and 200 DMA in Nifty. Hence, a bullish instance should proclaim for this expiry if the level sustain for wednesday trading session. In-case, of reversal the market might enter into short term bearish reversal.

Happy Trading.