Order Request — Gold Trading Robot

Project summary

I need an MQL5 Expert Advisor that implements a grid-style scaling strategy for gold. The EA will open fixed mini-lots on every fixed-dollar move within a user-defined price range, include trailing-stop logic, risk/metrics display on chart, and a configurable EMA filter (timeframe and period configurable).

Functional requirements (must-have)

1. Symbol & units

• Primary symbol: XAUUSD (please confirm symbol naming with my broker; fallback: “XAUUSD”).
• Money-based distance (USD) used for grid steps and TP/TS values (not pips).

2. Position sizing / grid

• For every $10 move in price (up or down) from the initial entry level, the EA should place 0.01 lot. Position sizing must be an input parameter (default = 0.01 lot)
• No stop loss on opening (initially), Take Profit = $15 (per trade; absolute USD profit target).
• Grid spacing (dollar amount per step) must be an input parameter (default = 10 USD).
• Lot size per step must be an input (default = 0.01 lot).

3. Operate only within a defined price band

• The EA must only open new trades when the current market price is inside a configurable range:
• Default example: MinPrice = 4000, MaxPrice = 4200 (inputs).
• If price is outside that range, no new orders should be sent; existing orders remain active (unless closed by logic below).

4. Max positions

• The total number of open positions opened by the EA must never exceed 20 (configurable input; default 20).

5. Trailing stop / profit protection

• Once a trade’s profit (floating or reached profit?) reaches $12, apply a trailing-stop logic so that the trade's profit cannot fall below $10.
• Implementation detail (preferred): when the floating profit for an order ≥ $12, immediately set a stop-loss such that the remaining achievable profit is ≥ $10 (i.e., SL = current price - amount equivalent to $10). If broker requires price/points, convert USD to price difference using contract specification.
• The trailing/protection should be applied per trade and ensure that after activation the realized profit does not drop below $10 for that trade.
• Parameters configurable:
• Trailing activation profit (default = 12 USD)
• Minimum secured profit (default = 10 USD)
• Trailing behavior (instant set SL to secure profit / step-based trailing) — implement instant secure SL by default, with an optional step-based trailing as an input.

6. EMA filter (multi-timeframe & configurable)

• Plot Exponential Moving Average (EMA) on the chart (default period = 20 EMA on chart timeframe).
• Display the EMA period and current EMA value on the chart and expose them as input parameters.
• Additional rule (4-hour filter): If the price has closed below the EMA on the selected higher timeframe (default = 4H), the EA must NOT allow new trades until the price has closed above that EMA on the same higher timeframe.
• Both the EMA period and the filter timeframe must be input parameters (so I can change them later).

7. Risk / metrics panel on chart

Display a small info panel on the chart showing (real-time and updated):

• Number of open trades (count).
• Current P/L (floating) in USD.
• Return on equity percentage (ROE) — formula: (current equity - starting equity) / starting equity * 100. Use equity at EA start or a configurable “base equity” input.
• High watermark (equity peak observed while EA has been running).
• Expected drawdown (value & percentage) assuming all 20 positions are opened and are in loss — compute worst-case equity if all positions opened at current size and then move to some realistic stress price?
• Implementation suggestion: compute expected drawdown using: worst-case scenario where all remaining allowed positions are opened at the furthest grid levels and move to a configurable adverse move. Provide inputs for how to compute this (e.g., assume each of 20 positions losing X USD each) — developer to propose a clear formula in documentation.
• All these metrics must refresh live and be visible on the main chart.

Manual Trading Compatibility-

• I am a semi-systematic trader and will also take manual long-term trades on the same symbol (Gold / XAUUSD).
• The EA must not interfere with any manual trades.
• The EA should:
• Only manage the trades that it has opened, identified by a unique MagicNumber.
• Completely ignore all manual trades (no modification, no closure, no trailing, no filters applied to manual positions).
• Not block me from manually opening or closing positions at any time.
• The EA’s logic (grid, max positions, EMA filter, trailing stop, etc.) must apply ONLY to EA trades, not manual trades.