mt5-httpapi

REST API on top of MetaTrader 5 running inside a Windows VM. Talk to it with plain HTTP/JSON — no MT5 libraries, no Windows, no bullshit. Just curl and go.

For installation and setup, see references/setup.md.

Setup

The API should already be running. Set the base URL:

export MT5_API_URL=http://localhost:6542

Each terminal has its own port (configured in terminals.json). If running multiple terminals, set MT5_API_URL to the port for the terminal you want to talk to.

Verify: curl $MT5_API_URL/ping — should return {"status": "ok"}. If not, the API isn't up yet (may still be initializing — it retries in the background).

How It Works

GET for reading, POST for creating, PUT for modifying, DELETE for closing/canceling. All bodies are JSON.

Every error response:

{"error": "description of what went wrong"}

Pre-Trade Checks (DO NOT SKIP)

Before placing any trade:

1. GET /account → trade_allowed must be true
2. GET /symbols/SYMBOL → trade_mode must be 4 (full trading)
3. GET /symbols/SYMBOL → check trade_contract_size — 1 lot of EURUSD = 100,000 EUR, not 1 EUR
4. GET /terminal → connected must be true

API Reference

Health

curl $MT5_API_URL/ping
# {"status": "ok"}

curl $MT5_API_URL/error
# {"code": 1, "message": "Success"}

Terminal

curl $MT5_API_URL/terminal
curl -X POST $MT5_API_URL/terminal/init
curl -X POST $MT5_API_URL/terminal/shutdown

Key fields on /terminal: connected, trade_allowed, build, company.

Account

curl $MT5_API_URL/account

{
    "login": 12345678,
    "balance": 10000.0,
    "equity": 10000.0,
    "margin": 0.0,
    "margin_free": 10000.0,
    "margin_level": 0.0,
    "leverage": 500,
    "currency": "USD",
    "trade_allowed": true,
    "margin_so_call": 70.0,
    "margin_so_so": 20.0
}

Symbols

curl $MT5_API_URL/symbols
curl "$MT5_API_URL/symbols?group=*USD*"
curl $MT5_API_URL/symbols/EURUSD
curl $MT5_API_URL/symbols/EURUSD/tick
curl "$MT5_API_URL/symbols/EURUSD/rates?timeframe=H4&count=100"
curl "$MT5_API_URL/symbols/EURUSD/ticks?count=100"

Timeframes: M1 M2 M3 M4 M5 M6 M10 M12 M15 M20 M30 H1 H2 H3 H4 H6 H8 H12 D1 W1 MN1

Key symbol fields: bid, ask, digits, point, trade_contract_size, trade_tick_value, trade_tick_size, volume_min, volume_max, volume_step, spread, swap_long, swap_short, trade_stops_level, trade_mode.

Orders

# Place market order
curl -X POST $MT5_API_URL/orders \
  -H 'Content-Type: application/json' \
  -d '{"symbol": "EURUSD", "type": "BUY", "volume": 0.1, "sl": 1.08, "tp": 1.10}'

# List pending orders
curl $MT5_API_URL/orders
curl "$MT5_API_URL/orders?symbol=EURUSD"
curl $MT5_API_URL/orders/42094812

# Modify pending order
curl -X PUT $MT5_API_URL/orders/42094812 \
  -H 'Content-Type: application/json' \
  -d '{"price": 1.09, "sl": 1.07, "tp": 1.11}'

# Cancel pending order
curl -X DELETE $MT5_API_URL/orders/42094812

Order types: BUY, SELL, BUY_LIMIT, SELL_LIMIT, BUY_STOP, SELL_STOP, BUY_STOP_LIMIT, SELL_STOP_LIMIT

Fill policies: FOK, IOC (default), RETURN

Expiration: GTC (default), DAY, SPECIFIED, SPECIFIED_DAY

Required fields: symbol, type, volume. price auto-fills for market orders.

Trade result:

{
    "retcode": 10009,
    "deal": 40536203,
    "order": 42094820,
    "volume": 0.1,
    "price": 1.0950,
    "comment": "Request executed"
}

retcode 10009 = success. Anything else = something went wrong.

Positions

curl $MT5_API_URL/positions
curl "$MT5_API_URL/positions?symbol=EURUSD"
curl $MT5_API_URL/positions/42094820

# Update SL/TP
curl -X PUT $MT5_API_URL/positions/42094820 \
  -H 'Content-Type: application/json' \
  -d '{"sl": 1.085, "tp": 1.105}'

# Close full position
curl -X DELETE $MT5_API_URL/positions/42094820

# Partial close
curl -X DELETE $MT5_API_URL/positions/42094820 \
  -H 'Content-Type: application/json' \
  -d '{"volume": 0.05}'

Key position fields: ticket, type (0=buy, 1=sell), volume, price_open, price_current, sl, tp, profit, swap.

History

curl "$MT5_API_URL/history/orders?from=$(date -d '1 day ago' +%s)&to=$(date +%s)"
curl "$MT5_API_URL/history/deals?from=$(date -d '1 day ago' +%s)&to=$(date +%s)"

from and to are required, unix epoch seconds.

Deal fields: type (0=buy, 1=sell), entry (0=opening, 1=closing), profit (0 for entries, realized P&L for exits).

Position Sizing

risk_amount     = balance * risk_pct
sl_distance     = ATR * multiplier
ticks_in_sl     = sl_distance / trade_tick_size
risk_per_lot    = ticks_in_sl * trade_tick_value
volume          = risk_amount / risk_per_lot

Round down to nearest volume_step, clamp to [volume_min, volume_max]. Sanity check: volume * trade_contract_size * price should make sense relative to account balance.

Tips

• Always check retcode — 10009 = good, anything else = bad
• Use GET /error to debug failed trades
• deviation on orders = max slippage in points (default 20, raise for volatile markets)
• type_filling matters — try FOK, IOC, RETURN if orders get rejected
• Candle time is the open time, not close time
• trade_stops_level = minimum SL/TP distance from current price in points
• Markets have hours — check trade_mode before placing orders