Nifty could see gap up opening due to firm Asian Markets and it has immediate resistance at 5020 and 5055 levels. If NIFTY breaks above 5055 on weekly closing basis, short term fresh buying can be expected and then 5153 and 5183 levels are possible. On the lower side, the support would be at 4815 and 4757 levels. Trade Cautiously as volatility may remain high ahead of weekly inflation data released later in the day. Investors are advised to build their portfolio in the form of SIP (Systematic Investment Plan) scheme for the next two – three months on weekly basis said by sharetipsexpert.com.