The bull run we are witnessing may be wave 4 of the downward rally in Nifty.
In that case, we may expect a collapse from here. Currently nifty is trading close to 18100 which corresponds to 0.618 levels of the downward Elliot wave.
This level should be a stiff resistance for nifty. Next week market may open with a gap up and can get sold into.
Day closing above 18100 will nullify this view.
Based on Fibonacci extensions wave 5 can take nifty to 16500 levels by June end.