Trading mechanics
The MetaTrader 5 symbol specification describes the trading unit, price increment, volume rules, currencies, financing fields, and sessions.
Contract size, tick size, tick value, minimum volume, volume step, and profit currency affect how price movement maps to account value. Margin currency and calculation mode affect required margin. These fields should be read from the exact symbol on the exact account being used.
Trading sessions, swap values, and other server-supplied fields may be updated. Recheck the specification before trading a less familiar symbol and before dates that may affect sessions or financing. Screenshots and old examples should not be used as substitutes for current platform data.