NIFTY closed below its trendline! showing signs of weakness?

As we can see despite a strong opening NIFTY couldn't sustain itself above 18800 neither did it cross 18900, on the breach of which we were planning to go long and was expecting a good upmove above hence now if NIFTY fails to open strong and rather opens flat to weak then we might see a strong downfall in the first half finally taking support at 18660 levels and the trendline now might act as a RESISTANCE now so plan your trades accordingly