NIFTY expiry

For nifty 19075 is very important for today , which is yesterday's closing. In case market cross it market might see a fall as at 19000 there is huge. So risk of of unwinding and which might drag the market . Where as on the upside the market might no go above 19200 . So today view is neutral to negative
I except market fall to end anywhere between 18800 to 18500 which would be critical range