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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
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Rule # 1: Always has one buy and one sell base trade active on each grid.
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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
| Input | Description |
|---|---|
| GridSizePips = 30 | Distance between grid levels |
| LotSizes = "0.01;0.02;0.03;0.06;0.09;0.18;0.33;0.57;0.75" | Manual list of lot sizes per leg; last one repeats if needed |
| Profit$ = 10 | Hidden profit target in account currency (for martingale baskets) |
| ProfitPips = 5 | Hidden pip target from weighted average price |
| HedgeLevel = 10 | Number of grids from anchor before hedge trigger |
| Max Equity = 1000 | Maximum Negative Equity from anchor will trigger hedge |
| MaxSpreadPips = 1 | Spread filter – skip new trades if exceeded |
| MagicNumber = 1995 | Default magic number, user can change |
| SlippagePips = 1 | Max slippage allowed |
| AllowHedgeReset = true | Enables/disables the hedge reset logic |
| AllowNewCycle = true | Master on/off switch for opening new cycles after hedge |
| CommentTag = "GridMartingaleEA" | Order comment prefix |
🧩 Definitions
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Pip: 0.0001 for standard pairs, 0.01 for JPY pairs.
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Convert grids to points automatically.
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Spread check: If spread > MaxSpreadPips, skip new entries but continue managing open trades.
🔁 State Model (per symbol)
The EA tracks:
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anchor_price : Starting point for the current grid cycle.
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grid_index : Current grid level relative to anchor.
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Lists of open buy and sell trades (tickets, lots, prices, grid levels).
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lot_step_index_buy/sell : Which lot size to use next.
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hedge_triggered : Flag for when hedge is active.
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cycle_id : Used in comments for order tracking and recovery after restart.
🧠 Trading Logic Summary
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On startup (Grid 0)
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Open one Buy and one Sell (first lot each).
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No visible SL/TP — handled internally.
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When price moves one grid up:
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The Buy side (with trend) closes its hidden TP and reopens a new base Buy at the new level.
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The Sell side adds a new leg (next lot size) at the new grid level.
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When price moves one grid down:
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Mirror behavior — Sell side takes profit and reopens; Buy side adds new leg.
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Take Profit rules:
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Base trades close individually on hidden TP (small cash or pip target).
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Martingale baskets close all legs together when combined profit hits the target (cash or pips).
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Hedge Reset:
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If price moves HedgeLevel grids away from anchor, EA opens a hedge position equal to total opposite exposure.
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After that, all orders stay open for manual closure.
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EA resets cycle (new anchor = current price, clear arrays, start over).
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Limits:
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Max one buy and one sell per grid level.
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If spread too high, skip entries.
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Continue managing existing trades even when new entries are paused.
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🧾 Technical Notes for Implementation
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Use SymbolInfoInteger to get pip size/digits.
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Parse LotSizes string into a numeric array; repeat last value if more legs are needed.
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Respect broker min/max lot and margin.
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Handle ECN brokers (no SL/TP on order send).
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Retry on REQUOTE or PRICE_CHANGED .
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Identify each order by magic number + cycle_id + grid + side + leg in comment.
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Manage logic on every tick (or timer for quiet markets).
🧱 Example Flow
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Grid 0: Buy 0.01, Sell 0.01
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Price up 1 grid → Buy hits hidden TP → new Buy 0.01; Sell adds 0.02 leg
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Price up another grid → Buy TP again → new Buy 0.01; Sell adds 0.03 leg
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Price drops back → Buy side now accumulates legs; Sell side resumes its base TP behavior.
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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:
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Refresh automatically on every tick (or once per second).
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Always show the current EA state clearly — even if no trades are open.
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If either side (Buy or Sell) is running a martingale sequence, label it as “Martingale”; otherwise, “Neutral”.
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Floating profit/loss should show the combined unrealized P/L of the active martingale basket in account currency.
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Use consistent decimal precision (2 for lots, 1 for pips, 2 for USD).
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Optional: color-code values for clarity (e.g., green for profit, red for loss).
Placement and style:
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Top-Right or Left corner of the chart.
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Clear, easy-to-read font.
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Simple layout, no external UI libraries needed.
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Should not interfere with order execution or EA logic.