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Market Info — Overview

This section contains market data and instrument metadata methods for MT4. Use it to discover symbols, read quotes, fetch historical candles, and get contract/tick parameters.

📂 Methods in this folder

  • ShowAllSymbols.md Full catalogue of all instruments available in the terminal (names + indices).

  • ShowSymbols.md Lightweight list of symbol names and indices (basic variant).

  • ShowSymbolParams.md Extended parameters for a symbol: digits, volume rules, currencies, trade mode.

  • ShowQuote.md Latest bid/ask snapshot for a single symbol.

  • ShowQuotesMany.md Snapshot quotes for multiple symbols at once; useful before subscribing to ticks.

  • ShowQuoteHistory.md Historical OHLC data (candles) for a symbol over a timeframe.

  • ShowTickValues.md TickValue / TickSize / ContractSize for one or more symbols (P/L & sizing math).

âš¡ Typical Workflows

1) Build a watchlist and show live prices

// Discover and pick symbols
syms, _ := svc.ShowAllSymbols(ctx)

// Get initial snapshot for the shortlist
_ = svc.ShowQuotesMany(ctx, []string{"EURUSD", "GBPUSD"})

// (optional) Subscribe to ticks in the Streaming section
// svc.StreamQuotes(ctx)

2) Validate trading inputs and display instrument info

// Fetch parameters for validation and formatting
_ = svc.ShowSymbolParams(ctx, "EURUSD")

// Compute monetary values
_ = svc.ShowTickValues(ctx, []string{"EURUSD"})

3) Chart a symbol

// Pull historical candles and render
_ = svc.ShowQuoteHistory(ctx, "EURUSD")

✅ Best Practices

  1. Key by name, not index. SymbolIndex can change across sessions; persist SymbolName.
  2. Format by Digits. Use Digits from ShowSymbolParams for UI; keep raw doubles for math.
  3. Batch when possible. Prefer ShowQuotesMany and ShowTickValues to reduce round‑trips.
  4. Time is UTC. Quotes and candles come with UTC timestamps—convert only at presentation.
  5. Broker suffixes are real. Treat EURUSD.m / XAUUSD-RAW as distinct symbols.

🎯 Purpose

The Market_Info block helps you:

  • Discover and organize instruments.
  • Read current and historical market data.
  • Validate and format symbol‑specific values (digits, steps, currencies).
  • Compute monetary effects (tick value/size, contract size) for risk & P/L.

👉 Use this page as a map. Jump into each .md file for full method details, parameters, and pitfalls.