Nifty - Possibly bearish expiry if it crosses 18070

Nifty is currently taking support at the intersection of both the lower and upward sloping trendlines. It is also forming a double top pattern more visible on 4hr and Daily charts with RSI just above 50 region.

Once RSI breaks below 50 and Nifty closes below 18030 chances are high it can move towards 17930-17960 today which would be a good shorting opportunity.