Build an MT5 Expert Advisor: Grid Martingale with Dual Cycles & Hedge

EA Concept: Grid Martingale with Hedge

This EA for MT5 (MQL5) runs a continuous price-level grid system with independent buy and sell cycles.
It uses manual martingale lot sizes, a hidden profit target, and a Full hedge when price moves too far from the anchor or reaches max negative equity.

No indicators or signals — it starts trading immediately on launch.

🎯 Core Behavior

• Rule # 1: Always has one buy and one sell base trade active on each grid.

• Rule # 2:  As price moves in one direction, the with-trend side keeps taking hidden TPs at next grid and reopening.

• Rule # 3:  The against-trend side builds a martingale basket using predefined lot steps.
• Rule # 4:  Once the basket’s total floating profit reaches a set cash or pip target, it closes all trades on that side together.
• Rule # 5:  If price keeps trending far enough (past a defined number of grids or equity), the EA opens a full hedge to flatten exposure, then resets the whole cycle.

⚙️ Key Inputs

🧩 Definitions

• Pip: 0.0001 for standard pairs, 0.01 for JPY pairs.

• Convert grids to points automatically.

• Spread check: If spread > MaxSpreadPips, skip new entries but continue managing open trades.

🔁 State Model (per symbol)

The EA tracks:

• anchor_price : Starting point for the current grid cycle.

• grid_index : Current grid level relative to anchor.

• Lists of open buy and sell trades (tickets, lots, prices, grid levels).

• lot_step_index_buy/sell : Which lot size to use next.

• hedge_triggered : Flag for when hedge is active.

• cycle_id : Used in comments for order tracking and recovery after restart.

🧠 Trading Logic Summary

1. On startup (Grid 0)

   • Open one Buy and one Sell (first lot each).

   • No visible SL/TP — handled internally.

2. When price moves one grid up:

   • The Buy side (with trend) closes its hidden TP and reopens a new base Buy at the new level.

   • The Sell side adds a new leg (next lot size) at the new grid level.

3. When price moves one grid down:

   • Mirror behavior — Sell side takes profit and reopens; Buy side adds new leg.

4. Take Profit rules:

   • Base trades close individually on hidden TP (small cash or pip target).

   • Martingale baskets close all legs together when combined profit hits the target (cash or pips).

5. Hedge Reset:

   • If price moves HedgeLevel grids away from anchor, EA opens a hedge position equal to total opposite exposure.

   • After that, all orders stay open for manual closure.

   • EA resets cycle (new anchor = current price, clear arrays, start over).

6. Limits:

   • Max one buy and one sell per grid level.

   • If spread too high, skip entries.

   • Continue managing existing trades even when new entries are paused.

🧾 Technical Notes for Implementation

• Use SymbolInfoInteger to get pip size/digits.

• Parse LotSizes string into a numeric array; repeat last value if more legs are needed.

• Respect broker min/max lot and margin.

• Handle ECN brokers (no SL/TP on order send).

• Retry on REQUOTE or PRICE_CHANGED .

• Identify each order by magic number + cycle_id + grid + side + leg in comment.

• Manage logic on every tick (or timer for quiet markets).

🧱 Example Flow

1. Grid 0: Buy 0.01, Sell 0.01

2. Price up 1 grid → Buy hits hidden TP → new Buy 0.01; Sell adds 0.02 leg

3. Price up another grid → Buy TP again → new Buy 0.01; Sell adds 0.03 leg

4. Price drops back → Buy side now accumulates legs; Sell side resumes its base TP behavior.

5. If Sell basket profit ≥ $10 (or 5 net pips), close all Sell legs; reset side.

🧩 Summary in One Line

Always one buy + one sell active, build martingale legs only on the losing side, close baskets at hidden TP, and if price drifts too far — hedge Full and restart EA.

On-Chart Summary Display

Add an on-chart status summary that updates automatically while the EA is running.
The summary should display key live metrics for both Buy and Sell sides in a compact, readable format at the top-left corner of the chart.

Display format example:

Behavior requirements:

• Refresh automatically on every tick (or once per second).

• Always show the current EA state clearly — even if no trades are open.

• If either side (Buy or Sell) is running a martingale sequence, label it as “Martingale”; otherwise, “Neutral”.

• Floating profit/loss should show the combined unrealized P/L of the active martingale basket in account currency.

• Use consistent decimal precision (2 for lots, 1 for pips, 2 for USD).

• Optional: color-code values for clarity (e.g., green for profit, red for loss).

Placement and style:

• Top-Right or Left corner of the chart.

• Clear, easy-to-read font.

• Simple layout, no external UI libraries needed.

• Should not interfere with order execution or EA logic.