Gap

A sharp price movement with little or no trading in between.  

Gearing

Another term for leverage used in trading to amplify exposure.

Going Long

Buying an asset with the expectation that its price will rise.

Going short

Selling an asset with the expectation that its price will fall.  

Gross profit

Revenue minus the cost of goods sold before expenses.  

Guaranteed stop

A stop-loss order that guarantees execution at the specified price.