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Technical Analysis - An effort to forecast prices by analyzing market data, i.e. historical price trends and averages, volumes, open interest, etc.
Tick - A minimum change in price, up or down.
Tomorrow Next (Tom/Next) - Simultaneous buying and selling of a currency for delivery the following day.
Transaction Cost - the cost of buying or selling a financial instrument.
Transaction Date - The date on which a trade occurs.
Turnover - The total money value of all executed transactions in a given time period; volume.
Two-Way Price - When both a bid and offer rate is quoted for a FX transaction.