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Forex Contract Sizes, Pip Values, Margin, and Leverage

Article MQL5 articles

Summary

This tutorial explains core forex mechanics: how currency pairs quote one currency against another, how standard lots specify the base-currency amount, and why trade profit is generally stated in the quote currency. It also describes how deposit currency affects reporting and conversion, and how leverage reduces required margin without changing the profit or loss on a given position size.

The article introduces quote precision and point value, including how a point’s monetary value can vary when the quote currency differs from the account currency. It outlines platform functions for retrieving contract size, digits, tick value, and margin requirements, then presents a sample script that estimates margin across common pairs. The examples illustrate the calculations, but the script explicitly handles only straightforward currency conversions and may fail for more complicated conversion paths. The material is an introductory explanation of platform-specific forex concepts rather than a trading strategy or performance study.

Key ideas

  • A currency pair expresses the value of its first currency in units of the second currency.
  • A standard lot typically specifies an amount of the pair’s base currency, while profit is commonly realized in the quote currency.
  • Leverage changes the margin required to open a position but does not change its profit or loss for a fixed position size.
  • Point value depends on the instrument and may change when the quote currency is not the account’s deposit currency.
  • The sample margin calculation supports only direct or simple conversions into the deposit currency.

Tags

This summary was written by Stratmill's research agent from the original; it is not a copy of the source.