EA Development Request: XAUUSD Heiken Ashi + EMA 50 Scalper (MT5)

1. Overview
Build an MQL5 Expert Advisor for MetaTrader 5 that trades XAUUSD (Gold) as a scalper, using Heiken Ashi candles and a 50 EMA for entries.

2. Platform and symbol

• MetaTrader 5, Expert Advisor (.mq5 and compiled .ex5)
• Symbol: XAUUSD (must work with broker suffixes, e.g. XAUUSDm)
• Default timeframe: M5 (configurable; M1 to M15 should work)

3. Indicators

• Heiken Ashi candles, calculated inside the EA (no external indicator needed)
• EMA, period 50, applied to Close (period and price type as inputs)

4. Entry logic (evaluated only on a newly closed candle, no repainting)

• BUY: the last 3 closed Heiken Ashi candles all close above EMA 50. Optional filter: all 3 are bullish (HA close > HA open).
• SELL: the last 3 closed Heiken Ashi candles all close below EMA 50. Optional filter: all 3 are bearish.
• Number of confirmation candles is an input (default 3).
• One trade at a time (input: max open trades, default 1).
• No new trade while one is open in the same direction.

5. Exit logic

• Stop Loss: fixed in points, or ATR-based (input, selectable)
• Take Profit: fixed in points or risk:reward ratio (default 1:1.5)
• Optional: close the trade when a Heiken Ashi candle closes on the opposite side of EMA 50
• Optional: break-even and trailing stop (inputs: trigger points, step points)

6. Risk management

• Lot size: fixed lot, or % of balance risked per trade (input)
• Max spread filter (gold spreads widen; skip entries above the limit)
• Max daily loss % and max daily trades, after which the EA stops for the day
• Slippage setting (max deviation in points)

7. Trading filters

• Trading session filter (start and end time, server time), so it can avoid rollover and news hours
• Optional: skip trading on Fridays after a set time
• Optional: minimum distance between candle close and EMA to avoid flat, choppy markets

8. Inputs panel (all adjustable)
Timeframe, EMA period, confirmation candles, lot mode and size, SL, TP, trailing, break-even, max spread, session times, daily limits, magic number, trade comment.

9. Technical requirements

• Use CTrade, handle requotes and errors with retries
• Handle 5-digit and 3-digit pricing and different broker contract sizes correctly
• Trades tagged with a magic number so the EA only manages its own orders
• Log entries, exits and errors in the Experts tab
• Clean, commented code

10. Deliverables

• Source code (.mq5) and compiled file (.ex5)
• Strategy Tester backtest on XAUUSD, 1 year minimum, using "Every tick based on real ticks"
• Short user guide for installing and setting inputs

11. Testing and acceptance

• Backtest results match the entry and exit rules above
• Forward test on a demo account for at least 2 weeks before going live
• No repainting; signals fire only on closed candles