The nearest expiration date for Gasoil 0.1% Barges FOB ARA (Platts) Futures (Feb 2015) is Mar 6, 2015.
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 (Feb 2015) before Mar 6, 2015.