Angel Broking : The trend deciding level for the day is 16,139/4,845 levels. If Nifty trades above this level during the first half-an-hour of trade, then we may witness a further rally up to 16,290-16,439/4,894-4,943 levels.

However, if Nifty trades below 16,139/4,845 levels for the first half-an-hour of trade then it may correct up to 15,990-15,839/4,797-4,748 levels.

Sharekhan: This week, the market may witness volatility, as the traders will rollover positions in the derivatives segment from the August 2011 series to the September 2011 series.

The near-month August 2011 derivatives contract will expire on Thursday (August 25, 2011). The market may continue to be in bearish trend and more downside is expected until a definite signal on how the US and European situation would be resolved. The FII activity and global economic data will also decide the future path of the market.