Chip designers are in favour ahead of the Consumer Electronics Show in Las Vegas, which boots up tomorrow. CSR heads the list of FTSE 250 risers.Delivery firm Ocado is having a much better 2011 so far than it did 2010. The online grocer's shares are up more than 23% over the last week and now trade comfortably above their flotation price of 180p.Oil companies are wanted with Heritage Oil and JKX Oil & Gas performing well.Fast growing pizza delivery firm Domino's Pizza will deliver an extra topping of profits after a strong finish to the year. System sales for the 13 week period to 26 December increased by 17.8% to £132.5m from £112.4m in the corresponding period of 2009.FTSE 250 - RisersCSR (CSR) 376.50p +7.48%Ocado Group (OCDO) 205.80p +4.63%Heritage Oil (HOIL) 478.30p +4.50%Regus (RGU) 91.15p +4.41%Tullett Prebon (TLPR) 412.40p +4.14%Howden Joinery Group (HWDN) 106.30p +4.01%Chemring Group (CHG) 3,139.00p +3.56%JKX Oil & Gas (JKX) 331.40p +3.56%Imagination Technologies Group (IMG) 384.60p +3.30%Keller Group (KLR) 663.50p +3.27%FTSE 250 - FallersWH Smith (SMWH) 476.80p -5.02%Dairy Crest Group (DCG) 395.20p -4.98%FirstGroup (FGP) 394.80p -4.31%Centamin Egypt Ltd. (CEY) 169.00p -4.03%Ashtead Group (AHT) 165.20p -3.79%Betfair Group (BET) 935.50p -3.71%Telecity Group (TCY) 466.40p -3.66%Hays (HAS) 129.10p -3.37%Halfords Group (HFD) 439.70p -3.28%ITE Group (ITE) 243.90p -3.25%