Ocado shares are on the surge after the online grocer announced it made a profit in the fourth quarter as a record number of customers pushed sales to an all-time high.Egypt-based miner Centamin rises higher following a reassuring statement over the impact of the current unrest in the country: "The company looks forward however to a speedy resolution to the current uncertainty and remains confident that such resolution will not negatively impact on the company's investment."Specialist carpet and floor coverings retailer Carpetright is in the red on the back of a profit warning issued this morning. Profits for the year to 30 April 2011 to be below the current range of market expectations as difficult trading conditions continue. Broker finnCap reduced forecasts for 2011 by 16.4% can kept its 'sell' rating.Helical Bar is making gains after it said it is increasing its investment in retail property while selling part of its industrial portfolio.Following suit it healthcare support services firm Synergy Health after underlying revenues grew in the nine months to end-December despite adverse weather conditions in northern Europe.FTSE 250 - RisersOcado Group (OCDO) 240.00p +10.09%Kenmare Resources (KMR) 38.75p +9.15%Centamin Egypt Ltd. (CEY) 147.00p +7.77%IG Group Holdings (IGG) 473.20p +4.69%Petropavlovsk (POG) 1,064.00p +4.01%Premier Foods (PFD) 22.15p +3.99%Spectris (SXS) 1,403.00p +3.93%Fidessa Group (FDSA) 1,597.00p +3.90%COLT Group SA (COLT) 150.50p +3.79%Aquarius Platinum Ltd. (AQP) 363.10p +3.77%FTSE 250 - FallersMillennium & Copthorne Hotels (MLC) 559.50p -3.37%Heritage Oil (HOIL) 315.70p -3.16%Carpetright (CPR) 707.50p -3.02%SIG (SHI) 141.70p -2.81%Cranswick (CWK) 835.00p -2.34%Enterprise Inns (ETI) 104.90p -2.24%Mothercare (MTC) 526.50p -2.14%Redrow (RDW) 116.20p -2.11%Barratt Developments (BDEV) 90.30p -2.01%Bovis Homes Group (BVS) 429.20p -1.90%