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Calculate Buy Margin (CalculateBuyMarginAsync)

Sugar method: Calculate exact margin required for BUY order before placing it.

API: MT5Service.CalculateBuyMarginAsync(...)
Region: [13] ORDER VALIDATION ⭐

Signature

public static async Task<double> CalculateBuyMarginAsync(
    this MT5Service svc,
    string symbol,
    double volume,
    double price = 0,
    int timeoutSec = 15,
    CancellationToken ct = default)

Parameters

Param Type Description
symbol string Symbol (e.g., "EURUSD")
volume double Volume in lots
price double Entry price (0 = market price)

Returns

Task<double> - Required margin in account currency

Examples

1. Market Order Margin

double margin = await svc.CalculateBuyMarginAsync("EURUSD", volume: 0.10);
Console.WriteLine($"Margin for 0.10 lots: ${margin:F2}");
// Output: Margin for 0.10 lots: $10.85

2. Pending Order Margin

double margin = await svc.CalculateBuyMarginAsync(
    "EURUSD",
    volume: 0.50,
    price: 1.08500);
Console.WriteLine($"Margin at 1.08500: ${margin:F2}");

3. Compare Multiple Volumes

double[] volumes = { 0.01, 0.10, 1.0, 10.0 };
Console.WriteLine("Volume  | Margin");
Console.WriteLine("--------|--------");

foreach (var vol in volumes)
{
    double margin = await svc.CalculateBuyMarginAsync("EURUSD", vol);
    Console.WriteLine($"{vol,7} | ${margin,7:F2}");
}

4. Check Affordability

double freeMargin = await svc.GetFreeMarginAsync();
double requiredMargin = await svc.CalculateBuyMarginAsync("EURUSD", 1.0);

if (freeMargin >= requiredMargin)
{
    Console.WriteLine($"✅ Can afford: ${freeMargin:F2} >= ${requiredMargin:F2}");
    await svc.BuyMarketAsync("EURUSD", 1.0);
}
else
{
    Console.WriteLine($"❌ Insufficient: ${freeMargin:F2} < ${requiredMargin:F2}");
}

5. Multi-Symbol Margin Planning

var symbols = new[] { "EURUSD", "GBPUSD", "USDJPY" };
double totalMargin = 0;

foreach (var symbol in symbols)
{
    double margin = await svc.CalculateBuyMarginAsync(symbol, 0.10);
    totalMargin += margin;
    Console.WriteLine($"{symbol}: ${margin:F2}");
}

Console.WriteLine($"Total margin needed: ${totalMargin:F2}");
  • CalculateSellMarginAsync() - SELL margin calculation
  • CheckMarginAvailabilityAsync() - Margin check + comparison
  • ValidateOrderAsync() - Full order validation

Summary

CalculateBuyMarginAsync calculates exact BUY margin:

  • ✅ Quick margin estimation
  • ✅ Works for market and pending orders
  • ✅ Essential for portfolio planning
  • ✅ Prevents "Not enough money" errors
double margin = await svc.CalculateBuyMarginAsync("EURUSD", 0.10);
if (await svc.GetFreeMarginAsync() >= margin)
{
    await svc.BuyMarketAsync("EURUSD", 0.10);
}