The January vaida managed to gain on rising demand, while the March contract was unchanged on the forward cottonseeds oilcake market on Thursday in the process of trading, dealers said. The January vaida closed at Rs 2049.70 and it showed 40 paisa gain at Rs 2050.10 at the opening session, they said. The March contract ended at 2150 and showed no change in the early hours, they said.