Getting Tick Value, Size, and Contract Size

Request: retrieve tick value, tick size, and contract size for multiple symbols Useful for calculating profit/loss and position sizing.

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Code Example

// --- Quick use (service wrapper) ---
await _service.ShowTickValues(new[] { "EURUSD", "XAUUSD" });

// --- Low-level (direct account call) ---
// Preconditions: account is connected via ConnectByServerName/ConnectByHostPort.

using var cts = new CancellationTokenSource(TimeSpan.FromSeconds(5));
var result = await _mt4.TickValueWithSizeAsync(
    symbolNames: new[] { "EURUSD", "XAUUSD" },
    deadline: null,
    cancellationToken: cts.Token);

foreach (var info in result.Infos)
{
    Console.WriteLine($"Symbol: {info.SymbolName}");
    Console.WriteLine($"  TickValue: {info.TradeTickValue}");
    Console.WriteLine($"  TickSize: {info.TradeTickSize}");
    Console.WriteLine($"  ContractSize: {info.TradeContractSize}");
}

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Method Signatures

// Service wrapper
Task ShowTickValues(string[] symbols);

// Low-level account call
Task<TickValueWithSizeData> TickValueWithSizeAsync(
    IEnumerable<string> symbolNames,
    DateTime? deadline = null,
    CancellationToken cancellationToken = default
);

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🔽 Input

Parameter	Type	Description
symbols / symbolNames	IEnumerable<string> (required)	One or more trading symbols (e.g., "EURUSD", "XAUUSD").
deadline	DateTime? (optional)	Optional UTC deadline for request timeout.
cancellationToken	CancellationToken (optional)	Token to cancel the operation.

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⬆️ Output

Returns TickValueWithSizeData containing:

Field	Type	Description
Infos	IList<TickValueWithSizeSymbolInfo>	Tick-related info per symbol.

TickValueWithSizeSymbolInfo fields:

Field	Type	Description
SymbolName	string	Trading symbol name.
TradeTickValue	double	Monetary value of one tick in the account currency.
TradeTickSize	double	Minimal price increment (tick size).
TradeContractSize	double	Units per 1.0 lot (broker-defined; e.g., 100000 for many FX pairs).

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🎯 Purpose

Provide core parameters for:

• Profit/loss estimation
• Pip value conversions
• Position sizing formulas

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🧩 Notes & Tips

• Pip vs tick. A pip is not always equal to one tick. Derive pip value as: pipValue = TradeTickValue * (pipSize / TradeTickSize) where pipSize depends on the instrument (e.g., 0.0001 for 5-digit FX pairs, 0.01 for JPY pairs).
• Account currency. TradeTickValue is already in the account currency; no extra conversion needed unless you aggregate across accounts.
• Contract size. Metals/indices/CFDs may use different contract sizes than FX. Always read TradeContractSize from the API instead of hardcoding.
• Caching. These parameters are fairly stable; cache per session and refresh when switching accounts or symbol groups.

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⚠️ Pitfalls

• Wrong pip math. Using Ask-Bid directly as “pips” without normalizing by TradeTickSize leads to wrong P/L.
• Assuming FX-only sizes. Not all instruments use 100000 units/lot; indices/commodities vary by broker.

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🧪 Testing Suggestions

• Happy path. For majors, TradeTickSize≈1e-5 and TradeContractSize≈100000.
• Edge cases. JPY pairs have TradeTickSize≈0.001; metals/indices return broker-specific contract sizes.
• Failure path. Invalid/disabled symbol should not crash; handle empty or missing entries gracefully.