Talking about the crucial levels to watch out in the coming week, the zone of 31,440-31,650 on the upside will be a major hurdle for the index. While, on the downside, the zone of 30,810-30,630 will be a crucial support for the index as it is the confluence of 50 per cent Fibonacci retracement level of its prior upward move (29,612.55-31,649.45) and 100-day EMA level.