Wave 4 (for the wave from Mar'20 low) was started from 16th feb and a flat correction (Wave A/W) was completed on 26th feb. As now wave B/X is in progress, it might be in range-bound between 14700 and 15400 levels.
Disclaimer: This is just my personal view. You are advised to rely on your own analysis while taking trading decisions.
Wave count from Mar'20 low
Today's fall is zigzag and it is wave (y). Pullback from day low looks like wxy, so there will be another fall wave (z).