Reverse auction is a type of auctions where bidder bid for the price for the services that they are willing to provide. In reverse auction the buyers put up an offer for required goods or services and the sellers bid the amount they want to receive for providing said goods. In the end a seller with the lowest price wins.

Regret theory is a theory that after a failed decision that calls for a following regret a person starts making the decision taking this regret into a consideration. Fear of regret can play a huge role in decision making process.

Remeasurement is a process of reevaluating the price for the asset or a foreign currency. There are several situations when the process can be appropriate. For example, when the benchmark price is changed.

Rickshaw man is a type of candlestick chart that shoes high and low points for the price as well as opening and closing prices. It is type of indicator that shows indecisiveness in the market. The body here is usually at the very middle of a stick.

Rain check is a promise from a seller or a buyer of a later commitment. This means that they are going to make a deal just not at a given period of time, but later. The price for the security is going to stay the same though.

Registered options trader is a trader who works on a trading floor and whose main task it to watch trading process of several options and to make sure that their trading is fair.

Recession proof is a term that is used to describe an asset, a company or an industry that can withstand the effects of the recession. Assets that are recession proof are usually included in the portfolio in order to protect it from huge losses as a result of retreats and recessions.

Rio trade is a slang term used to describe a transaction made in an attempt to recover previous losses. It is usually associated with risks higher than a trader would use in a regular trade.

Relisted is the company that after a while returned it shares for public trading. Sometimes companies take their shares off the market if trading fails to be satisfactory or they just prefer not to be traded publically because of the bad market condition.

A rainmaker is a person who brings a lot of money and work to the firm where they are working. In trading firm, it is a brokers who brought in the most money and the wealthiest customer.

Resistance level is a term that defines the price level of the asset where the price is held down by the number of traders who want to sell the asset at the moment. Resistance can be both short and long, as it is determined by the current trends in the market.

Reward risk ratio is another trading tool that can help a trader determine whether the risk they are taking with a certain trade is worth all of the potential winnings. in combinations with win rate can be one of the most important trading tools in the market.

A term used by The Dow Theory author, Robert Rhea, to describe the day-to-day fluctuations in stock market prices. Rhea wrote that three simultaneous movements of stock prices occur that can be compared to tides, waves, and ripples. Rhea's book, The Dow Theory, published in 1932, suggested that speculators attempt to ride the tides and the occasional big waves, and that only reckless investors would ever attempt to profit from day-to-day price ripples. 

A rate of return is the gain or loss on an investment over a specified time period, expressed as a percentage of the investment’s cost. Gains on investments are defined as income received plus any capital gains realized on the sale of the investment.

A recession is a significant decline in activity across the economy, lasting longer than two consecutive quarters. It is visible in industrial production, employment, real income and wholesale-retail trade. The technical indicator of a recession is two consecutive quarters of negative economic growth as measured by a country's gross domestic product (GDP).