Mostly Using Terms in Forex Conti....

Order — Order for a broker to buy or sell the currency with a certain rate.

Pivot Point — The primary support/resistance point calculated basing on the previous trend's High, Low and Close prices.

Pip (Point) — The last digit in the rate (e.g. for EUR/USD 1 point = 0.0001).

Profit (Gain) — Positive amount of money gained for closing the position.

Principal Value — The initial amount of money of the invested.

Realized Profit/Loss — Gain/loss for already closed positions.

Resistance — Price level for which the intensive selling can lead to price increasing (up-trend).

Scalping — A style of trading notable by many positions that are opened for extremely small and short-term profits.

Settled (Closed) Position — Closed positions for which all needed transactions has been made.

Slippage — Execution of order for a price different than expected (ordered), main reasons for slippage are — "fast" market, low liquidity and low broker's ability to execute orders.

Spread — Difference between ask and bid prices for a currency pair.
Standard Lot — 100,000 units of the base currency of the currency pair, which you are buying or selling.

Stop-Limit Order — Order to sell or buy a lot for a certain price or worse.

Stop-Loss Order — Order to sell or buy a lot when the market reaches certain price. It is used to avoid extra losses when market moves in the opposite direction. Usually is a combination of stop-order and limit-order.

Swap — Overnight payment for holding your position. Since you are not physically receiving the currency you buy, your broker should pay you the interest rate difference between the two currencies of the pair. It can be negative or positive.

Technical Analysis — The analysis based only on the technical market data (quotes) with the help of various technical indicators.

Trend — Direction of market which has been established with influence of different factors.
Unrealized (Floating) Profit/Loss — A profit/loss for your non-closed positions.

Useable Margin — Amount of money in the account that can be used for trading.

Used Margin — Amount of money in the account already used to hold open positions open.

Volatility — A statistical measure of the number of price changes for a given currency pair in a given period of time.

VPS (Virtual Private Server) — Virtual environment hosted on the dedicated server, which can be used to run the programs independent on the user's PC. Forex traders use VPS to host trading platforms and run expert advisors without unexpected interruptions.