Long Liquidation = Long position close
Short Covering = Short position close
Altogether the US Total Petroleum (RBOB Gasoline, Heating Oil etc.) Futures and Options Combined as of February 10, 2015 shows a Total Open Interest of 4,302,505 of which Managed Money are long positioned with 463,419 contracts and short positioned with 219,013 contracts. In the week ended February 10, long positions decreased by 12,801 and short positions decreased by 11,896 with net selling of 905 contracts.
Source: COT Reports