The nearest expiration date for Gasoil 0.1% Barges FOB ARA (Platts) Futures (Nov 2016) is Dec 7, 2016.
The best time to sell a futures contract is when you've already made money on the investment, but still have plenty of time left before the expiration date. Thus, a good option would be to sell Gasoil 0.1% Barges FOB ARA (Platts) Futures (Nov 2016) before Dec 7, 2016.