A working order is a general term for either a stop or limit order to open. It is used to advise your broker to execute a trade when an asset reaches a specific price.

WTI stands for West Texas Intermediate (occasionally called Texas Light Sweet), an oil benchmark that is central to commodities trading. It is one of the three major oil benchmarks used in trading, the others being Brent crude and Dubai/Oman.

Wire fraud is a fraudulent action in which a scheme to defraud or get money based on false representation or promises is built. 

A waiver of demand is a legally bounding agreement issued by a party that endorsed a check or bank draft.

Wirehouse describes a full-service broker-dealer firm. 

Wirehouse broker is not an independent broker working at a wirehouse, or a firm with multiple branches.

Weak shorts is a slang term used to denominate traders or investors who hold a short position in a stock or other financial asset and will close their position at the first sign of price strength. 

A wasting trust is a type of trust with depleted over time assets. Plan participants get payouts according the plan. 

Without recourse is a phrase that has several meanings. In general, it refers to the buyer of a promissory note or other negotiable instrument assuming the risk of default. 

Witching hour is the last hour of trading on the third Friday of every month. It is the day when options and futures on stocks and stock indexes expire.