Multiple EAs One Account: Setup Guide (2026)
Running multiple EAs on one account requires three critical configurations: unique magic numbers for each EA, reduced lot sizes to keep combined risk under 2%, and sufficient margin (300%+ free margin). Attach each EA to a separate chart, document your setup, and monitor combined exposure daily. Start with 2 EAs and scale up only after proving stability.
I run Golden Viper EA as my primary system, but I understand why traders want to diversify with multiple EAs on one account. The concept is sound -- different strategies can complement each other across varying market conditions. However, most traders who attempt this fail because they overlook the configuration details that prevent conflicts and control risk. This settings guide covers every parameter you need to configure correctly, from magic numbers to margin management, so your multiple EAs on one account setup runs smoothly.
In This Guide
Configuring Magic Numbers
Magic numbers are the foundation of running multiple EAs on one account. Without unique magic numbers, your EAs will interfere with each other's trades, leading to unexpected closures or duplicate positions.
What Magic Numbers Do
- Trade identification: Each EA tags its orders with its magic number
- Conflict prevention: EA-1 will not close or modify EA-2's trades
- Performance tracking: Separate trade history by EA on Myfxbook
- Manual trade protection: Manual trades use magic number 0, so EAs ignore them
How to Set Magic Numbers
- Right-click the chart with the EA attached
- Select "Expert Advisors" then "Properties"
- Go to the "Inputs" tab
- Find the "MagicNumber" parameter (naming varies by EA)
- Enter a unique integer (e.g., 111111 for EA-1, 222222 for EA-2)
- Click OK to apply
Best practice: Use distinctly different numbers (111111, 222222, 333333) rather than sequential ones (1, 2, 3). Document each EA's magic number in a spreadsheet. Never change a magic number while the EA has open trades.
Chart and Symbol Configuration
Each EA needs its own dedicated chart window. MT4/MT5 only allows one EA per chart.
Setup Steps
- Open a separate chart for each EA you want to run
- Set the correct symbol for each chart (check your broker's symbol naming)
- Set the correct timeframe each EA requires
- Drag the EA onto its chart from the Navigator panel
- Configure settings and click OK
Example Multi-EA Layout
| Chart | Symbol | Timeframe | EA | Magic Number |
|---|---|---|---|---|
| Chart 1 | XAUUSD | H4 | Golden Viper EA | 111111 |
| Chart 2 | EURUSD | H1 | Forex EA | 222222 |
| Chart 3 | GBPUSD | M15 | Scalper EA | 333333 |
Risk Settings for Multiple EAs
This is where most traders make their biggest mistake. They configure each EA with standalone risk settings and forget to account for combined exposure.
Recommended Risk Per EA
| Number of EAs | Risk Per EA Per Trade | Max Combined Risk |
|---|---|---|
| 1 EA | 1-2% | 1-2% |
| 2 EAs | 0.5-1% | 1-2% |
| 3 EAs | 0.3-0.7% | 1-2% |
| 5 EAs | 0.2-0.4% | 1-2% |
The golden rule: total combined risk across all EAs should not exceed 2% per trade event. If you normally risk 2% with one EA, you must reduce to 0.5% each when running four EAs. Learn more about position sizing in our lot sizing guide for $1,000 accounts.
Correlation Awareness
- High correlation: XAUUSD and XAGUSD move together -- running EAs on both is essentially doubling the same bet
- Moderate correlation: EURUSD and GBPUSD often move in the same direction
- Low correlation: XAUUSD and USDJPY often move inversely -- better diversification
Margin Requirements Configuration
Calculate worst-case margin usage before enabling multiple EAs:
- Minimum: 200% margin level at all times
- Recommended: 300-500% margin level
- Calculate worst case: All EAs at maximum simultaneous positions
If your worst-case scenario would drop margin below 150%, reduce lot sizes or run fewer EAs. A margin call with multiple EAs running is far more damaging than with a single EA because the broker may close positions from all EAs simultaneously.
Monitoring Configuration
Set up proper monitoring to catch problems early:
- Push notifications: Configure MT4 mobile app alerts for all trade events
- Myfxbook tracking: Connect your account to track each EA's performance by magic number
- Daily checklist: Verify all EAs show smiley face, check margin level, review journal for errors
- VPS monitoring: If running on a VPS, set up uptime monitoring to catch disconnections
Common Configuration Errors
- Same magic number on multiple EAs: Causes trade interference. Verify each EA has a unique number.
- Not reducing lot sizes: Combined risk exceeds tolerance. Recalculate per-EA risk.
- Wrong chart symbol: EA attached to wrong instrument. Verify symbol matches EA requirements.
- "Not enough money" errors: Insufficient margin for combined positions. Reduce lots or deposit more.
- Two EAs on same chart: Only the last attached EA runs. Open separate charts.
For general EA troubleshooting, see our XAUUSD trading guide and broker selection guide for execution quality tips.
Frequently Asked Questions About Multiple EAs on One Account
Can I run multiple EAs on one MT4 account?
Yes, you can run multiple EAs on one MT4 account by attaching each EA to a different chart and assigning unique magic numbers. Each chart window can only have one EA active, so open as many charts as you need. Ensure your account has sufficient margin for all combined positions.
What are magic numbers and why do they matter?
Magic numbers are unique identifiers assigned to each EA's trades. They prevent EAs from interfering with each other by ensuring each EA only manages trades it opened. Without unique magic numbers, one EA could accidentally close or modify another EA's positions, causing unexpected losses.
How much margin do I need for multiple EAs?
Calculate the combined maximum position sizes of all EAs and maintain at least 300 to 500 percent free margin. Plan for the worst case where all EAs open maximum positions simultaneously, which happens during volatile market events.
Should I reduce lot sizes when running multiple EAs?
Yes, absolutely. If you normally risk 2% per trade with one EA, reduce to 0.5-1% per EA when running multiple EAs so that total combined risk stays within 1-2%. This is the most commonly overlooked step and the primary cause of blown accounts in multi-EA setups.
Will multiple EAs slow down my platform?
Running 2 to 5 EAs on modern hardware with 8 GB RAM is usually fine. More than 5 may require additional resources or a dedicated VPS. Monitor CPU usage during high-activity market periods like the London-New York overlap when all EAs may be processing signals simultaneously.