Bullish trend was seen on the forward cottonseed oilcake market on Thursday in process of trading, dealers said. The December vaida that had closed at Rs 447.30 opened with 20 paisa gain at Rs 447.50 in process of trading, they said. The January contract which ended at Rs 897.90 opened with a rise of 30 paisa in the early hours at Rs 898.20, they said.