Managing Multi-Currency Price History for Momentum Calculations
Summary
The document explains how a MetaTrader library can collect price history for several currency symbols and provide rates or closing prices by symbol and bar position. A user creates a symbol collection, adds the markets to analyze, and updates it before running calculations. The update step checks whether enough historical data is available and reports currencies that need more history, helping avoid failed or incomplete calculations.
The examples show iterating over the collection to retrieve prior and current closes, then calculating a relative price change as a basic momentum measure. This can simplify multi-symbol indicator or expert-advisor code by centralizing history access and readiness checks. The material is an API usage description rather than a validated trading strategy: it gives no test results, rules for choosing symbols or lookback periods, or guidance on normalization, execution, and risk. Its examples are limited to price data retrieval and a simple change calculation.
Key ideas
- A symbol collection can hold multiple currency markets for shared price-history access.
- The update operation checks whether each symbol has enough history for the requested calculations.
- Rates or closing prices can be retrieved by symbol position and bar index.
- Relative change between two closes provides a basic momentum input, but no strategy validation is given.
Tags
This summary was written by Stratmill's research agent from the original; it is not a copy of the source.