Articles · Mike Harty · Published 2026-10-24 · Updated 2026-10-24
Grid and Martingale EAs: Why Smooth Equity Curves Fail
Short answer: Grid and martingale EAs look smooth because they don't close losing trades. They add to them and wait for price to come back. Most of the time it does. When a trend doesn't come back, the floating loss grows faster than the account, and months of small wins go in days.
Key takeaways
- A smooth balance curve says little. Watch equity drawdown.
- Doubling lots turns a 180-pip move into a loss about 20× larger than a fixed-lot grid takes.
- Telltale stats: 90%+ win rate, average loss many times the average win, and equity DD far above balance DD.
- The fix isn't a better grid. It's a defined worst case and capital sized for it.
How a grid adds risk
Illustrative example: GBPUSD, a new position every 20 pips against you, starting at 0.01 lots ($0.10 per pip per 0.01 lot). The floating loss is measured at the moment the last level opens.
| Levels open | Adverse move | Fixed 0.01 lots: total lots / floating loss | ×1.5 lots: total lots / loss | ×2 (martingale): total lots / loss |
|---|---|---|---|---|
| 5 | 80 pips | 0.05 / $20 | 0.13 / $33 | 0.31 / $52 |
| 8 | 140 pips | 0.08 / $56 | 0.49 / $165 | 2.55 / $494 |
| 10 | 180 pips | 0.10 / $90 | 1.13 / $413 | 10.23 / $2,026 |
At 10 levels on the doubling grid, every further 20 pips costs about another $2,046. A 180-pip move on GBPUSD is ordinary over a few days. (Arithmetic only. It ignores spread, swap and margin, and actual EAs vary.)
Why the curve looks smooth
- Baskets close in profit most of the time, so the balance steps up.
- The losing baskets don't show on the balance until they're closed, and on a grid that's either a small win later or a very large loss at once.
- So the win rate is high and the equity line hides spikes. Compare equity drawdown with balance drawdown on any signal. If equity is much worse, losses are being parked.
How to spot one from public stats
- Win rate above about 85–90% with average loss more than 3× the average win.
- Equity drawdown well above balance drawdown.
- Many simultaneous positions on one symbol, often at regular price gaps.
- Lot sizes rising inside a basket (look at the trade history).
- Vendor wording: "recovery", "smart averaging", "never closes at a loss", "no stop loss needed".
None of these alone proves a grid. Together they're strong evidence. Our review methodology caps any martingale without a hard stop at 3.0/10, whatever its returns.
If you run one anyway
- Fix the maximum number of levels and the maximum lot.
- Use a basket stop or a dollar loss limit, decided before you start.
- Size the account so that limit is a loss you can accept. See how much capital you need to run an EA.
- Don't run several grid EAs on the same account or currency. See running multiple EAs on one MT5 account.
- Track its results on their own with VRD Insight (free). Insight's drawdown is calculated from closed trades, so watch floating loss on the account too. Enforce the limit with VRD Guardian ($79), an equity protector and drawdown limiter with user-set news and risky-day windows. Guardian makes a best-effort attempt to limit losses and protect an account in difficulty using predefined rules. It cannot guarantee that losses will be avoided or that an account can be rescued. Gaps, slippage, broker or connectivity failures can prevent rules executing. Trading carries a high risk of loss.
- Before you go live, run the backtest through VRD Quant ($69) to see the capital and abandonment level it implies.
Start free: VRD Insight
Begin with VRD Insight, the free per-EA tracker for MT5, sold through the MQL5 Market. It splits your results by magic number so you can see which EA is earning and which is costing you (drawdown is calculated from closed trades). When you need more: 1. VRD Guardian ($79 or $25/month): loss limits per account and per EA. 2. VRD Quant ($69 or $20/month): turns a backtest into a capital plan. 3. VRD Complete ($149 or $35/month): all three, plus EA Passports and a central reserve.
Related reading
Risk disclaimer: Trading forex and CFDs with leverage carries a high risk of loss. Grid, martingale and recovery strategies can lose a large part of an account, or all of it, quickly. Examples here are illustrative arithmetic, not forecasts or advice. Past performance does not guarantee future results.
Frequently asked questions
What is the difference between a grid EA and a martingale EA?
A grid EA adds positions at fixed intervals as price moves against it. A martingale EA also increases the lot size each time, often doubling it. Many EAs combine the two, and some call it 'recovery'.
Why do grid EAs have such smooth balance curves?
Losing positions are held open rather than closed, so the balance only records the wins. The losses sit in floating equity until price comes back, or until the account can't hold them.
How can I tell if an EA is a grid or martingale from its stats?
Look for very high win rates with average losses several times larger than average wins, equity drawdown well above balance drawdown, many positions open at once on one symbol, and lot sizes that grow within a basket.
Can a grid EA be run safely?
It can be run with a defined worst case: a basket stop, a fixed maximum number of levels, a dollar loss limit and capital sized for that loss. Without those, the worst case is the whole account.
Does an equity protector stop a martingale blowing up an account?
It can close positions at a set loss level, which turns an open-ended risk into a defined loss. It can't guarantee execution through gaps, slippage or connection failures.
One EA blowup costs more than the whole suite.
VRD Complete contains single-EA blowups and frees capital you have parked as idle buffers. $149 at launch pricing.