Contingency Order
An order that is executed only when certain conditions of the security being traded, or another security, have been fulfilled. Such prerequisite conditions range in scope and depth. In a simple case, a contingency order may depend on the potential purchaser's ability to sell a different security in his or her portfolio to free the funds to make the purchase. In a more complicated situation, an options contingency order's execution may depend on the share price of the options' underlying stock
Investopedia Commentary
A stop-loss order can be viewed as a contingency order because it does not become a market order until the price of the stock being sold reaches a predetermined price. This type of order is very useful when applied to the sale or purchase of options.
Related Links
Understanding Order Execution
The Stop-Loss Order - Make Sure You Use It
See also: Day Order, Limit Order, Market Order, Not-Held Order, Order, Stop Order, Stop-Loss Order