When is Gasoil 0.1% Cargoes CIF NWE (Platts) Futures expiring?

The nearest expiration date for Gasoil 0.1% Cargoes CIF NWE (Platts) Futures is Nov 30, 1899.

When should I sell Gasoil 0.1% Cargoes CIF NWE (Platts) Futures?

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% Cargoes CIF NWE (Platts) Futures before Nov 30, 1899.

What is Open interest? How can I use it to trade Gasoil 0.1% Cargoes CIF NWE (Platts) Futures?

Open interest is the number of contracts held by traders in active positions — they're not closed or expired. For Gasoil 0.1% Cargoes CIF NWE (Platts) Futures this number is 0. You can use it to track a prevailing market trend and adjust your own strategy: declining open interest for Gasoil 0.1% Cargoes CIF NWE (Platts) Futures shows that traders are closing their positions, which means a weakening trend.