Looking from the perspective of an arch action, there seems pressure from top on every rise.
From fib perspective, the important fib support stands at 18941.8, which is the immediate important fib support.
From ABCD pattern perspective, D leg is activated and it also signals 18940 levels considering ideal condition of AB=CD
From EMA perspective, Nifty is trading below 20 and 50 EMA, which also signals bearish condition.
So considering above conditions Nifty can be seen at 18941.8 levels by 20th or 21st Nov'23