Coriander futures for May fell by Rs 84, or 1.19%, to Rs 6,950 per quintal in 13,140 lots.At the Multi Commodity Exchange (MCX), the April contract declined by Rs 80, or 1.15% to Rs 6,836 per quintal in 31,850 lots.Prices fell as speculators reduced their positions on the back of sluggish spot market demand.