As we can see NIFTY again closed around previous trading day CP and also we can see previous REVERSAL and the change of new trend from this level itself hence making this level a very important level. So, on monday if we see a flat opening and breaches this level of 15700 below we can see quick one sided fall till 15500 which is the next psychological level
On the other hand hand if manages to protect this level we can see NIFTY reversal from here