The volume of E-mini Natural Gas Futures is 282.00.
Open interest is the number of contracts held by traders in active positions — they're not closed or expired. For E-mini Natural Gas Futures this number is 22.42 K. You can use it to track a prevailing market trend and adjust your own strategy: declining open interest for E-mini Natural Gas Futures shows that traders are closing their positions, which means a weakening trend.