Let’s discuss the BANKNIFTY prediction for tomorrow, as today was expiry, and it gave a nice fall.
If we look at the chart data:
The market is making a flag and pole pattern. Right now, it’s in the Flag process, taking support at the lower trendline. 45600 seems to be the next good support point.

If we look at the OI data:
PCR = 0.60 shows the bearish market structure. Where 46000 is MAXPAIN. There are multiple resistances to the upside. But there is very little support on the lower side except 45500.
All important levels have been marked at chart.
If we look at the FII & DII data, it directly indicates a bearish market structure where pros have heavily shorted options.

Now, there are two cases at this point.
Case 1: The market can take support at this support line. And move to the bull side.
Case 2: If the market is broken to the downside, the next support point is at 45573.
Reasons:

1. Price < EMAs, which shows bearish market structure.
2. RSI < 40 shows weak bulls strength.
3. OI data PCR = 0.60 shows heavy bearish.
4. Making flag and pole pattern, which might lead to bullish momentum from the point at the trendline.

If there is any doubt pls comment I will be happy to clearify.