Lot Size Calculator Risk Manager Panel MT4

Lot Size Calculator, Risk Manager and Trade Panel for MetaTrader 4 — free edition of Lot Architect.

This free lot size calculator and position size calculator works out your exact lot size from the risk you choose, shows risk, reward and risk-to-reward (R:R) before you enter, and lets you place Market, Limit and Stop orders from a clean trade panel on your chart. It is position sizing, risk management and one-click trade execution in a single tool — the free edition of the Lot Architect trade manager.

The problem every trader knows

Accounts don't blow up because the analysis was wrong — they blow up because the position size was. Doing lot size math by hand at the moment of entry is slow and risky: one wrong decimal can wipe out an account, and guessing the volume destroys your money management plan. A proper lot size calculator and risk manager removes that mistake — instantly, on every trade.

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What this free trade panel does

• Position sizing by risk, not guesswork — set risk as % of account, a fixed money amount, or a fixed lot; get the exact volume instantly.
• Drag Entry / Stop-Loss / Take-Profit on the chart — stop loss and take profit update lot size, risk, reward and R:R live, with shaded risk/reward zones.
• See the trade before you take it — volume, required margin, money at risk (with %), reward and risk-to-reward ratio on one card.
• One-click order execution on demo accounts — try the full trade panel workflow risk-free.
• Multiple take-profit targets, commission input, dark/light themes, and hotkeys.

Accurate on Forex, Gold (XAUUSD), indices and CFDs — every figure uses the terminal's own contract data.

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Quick start

1. Attach the panel to your chart.
2. Choose LONG / SHORT and Market / Limit / Stop.
3. Drag the Entry / Stop-Loss / Take-Profit lines, or type the prices.
4. Pick Risk % / Risk $ / Lots and enter the value.
5. Read the result card — lot size, risk, reward, R:R.

Hotkeys: Shift+T trade · Tab flip · O order type · H lines · ` minimize.

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Go PRO — place LIVE trades in one click

This free edition calculates on any account and executes on demo. To place live orders in one click with the full Lot Architect trade manager and risk manager, get the PRO version:

👉 Lot Architect PRO for MT5: https://www.mql5.com/en/market/product/186011
👉 Lot Architect PRO for MT4: https://www.mql5.com/en/market/product/186058

Utility for position sizing and order execution. It does not predict markets or guarantee profit — you control every trade. Test on a demo account first.

Keywords: lot size calculator, position size calculator, position sizer, risk manager, risk management, money management, trade panel, trade manager, trade assistant, one click trading, risk reward, stop loss take profit, lot calculator, MT4 utility.