MT4 Common Errors: Fix Every Issue (2026)

I have encountered every MT4 error message imaginable while helping traders configure their Expert Advisors, and I can tell you that 95% of errors have straightforward fixes once you understand what the message actually means. The problem is that MetaTrader 4's error messages are often cryptic and unhelpful. This guide on MT4 common errors translates every major error into plain language and gives you the exact steps to fix each one, organized by category for quick reference.

Quick Reference: All MT4 Errors

Bookmark this table for instant reference when you encounter an error:

Connection Errors

No Connection / Connecting...

This is the most common MT4 error. The status bar at the bottom shows "No connection" or perpetually "Connecting..."

Causes and fixes (in order of likelihood):

1. Internet down: Check your internet connection with a browser
2. Wrong server: Go to File → Login to Trade Account, try a different server from the dropdown
3. Firewall blocking: Add terminal.exe to your firewall and antivirus exceptions
4. Broker maintenance: Check your broker's website for scheduled downtime
5. Expired credentials: Demo accounts expire -- contact broker for new credentials
6. VPN interference: Disable VPN temporarily to test

Common Error

Despite the vague name, "Common Error" usually means authentication failed. Your login, password, or server selection is incorrect. Re-enter your credentials carefully from the email your broker sent.

Old Version

Your MT4 build number is outdated. Download the latest version from your broker's website (not from random sites) and install it over your existing installation. Your EAs, settings, and trade history are preserved during the update.

Trading Errors

Trade Context Busy (Error 146)

MT4 can process only one trading operation at a time. This error occurs when:

• Multiple EAs attempt to trade simultaneously
• You manually trade while an EA is executing
• A script is running alongside an EA
• The previous trade request has not completed yet

Fixes:

1. Wait 5-10 seconds and retry the trade
2. If persistent, restart MT4
3. Avoid manual trading while EAs are active
4. If running multiple EAs, stagger their trading intervals

Invalid Stops (Error 130)

Your stop loss or take profit level is too close to the current market price. Every broker enforces a minimum stop distance.

How to fix:

1. Check your broker's minimum stop distance: right-click the symbol in Market Watch → Specification → look for "Stops level"
2. Move your SL/TP at least that many points away from the current price
3. For XAUUSD, minimum stops are typically 50-100 points (5-10 pips)
4. If using an EA, increase the SL/TP distance in the EA settings

Not Enough Money (Error 134)

Insufficient free margin to open the requested position size.

Fixes:

• Reduce lot size -- see our lot size guide for $1,000 accounts
• Close existing positions to free up margin
• Deposit additional funds
• Switch to a broker with higher leverage (if appropriate)

Off Quotes (Error 136)

The price moved too far between your order request and broker execution. Common during high-volatility events like NFP releases or market opens.

Fixes:

• Increase "Maximum deviation" in the order window (5-20 points for gold)
• Retry the trade -- it often succeeds on the second attempt
• Avoid trading during major news events when spreads are wide
• If using an EA, the EA should have built-in retry logic for this error

Market Closed (Error 132)

You are trying to trade outside market hours. Gold (XAUUSD) trades approximately 23 hours per day on weekdays, with a brief daily break. It is closed on weekends (Friday ~22:00 GMT to Sunday ~23:00 GMT).

Invalid Trade Volume (Error 131)

The lot size is outside your broker's allowed range. Check symbol specifications for minimum, maximum, and lot step values. Most brokers require lots in increments of 0.01.

EA-Specific Errors

EA Not Trading (Smiley Face but No Trades)

The EA is attached and permitted but not executing trades. This is a complex issue with multiple possible causes. See our comprehensive guide on fixing an EA that is not trading for a complete diagnostic checklist.

EA Shows Frowning Face

• AutoTrading button is disabled (not green) -- click to enable
• "Allow live trading" is unchecked in EA properties
• "Allow DLL imports" is unchecked but required
• License validation failed -- check the Experts tab for details

DLL Load Failed

• The .dll file is missing from MQL4/Libraries
• "Allow DLL imports" is not checked in EA properties
• Antivirus quarantined the DLL file -- add an exception
• 32-bit vs 64-bit mismatch -- MT4 is 32-bit, DLL must match

Cannot Load EA (Error in Experts Tab)

• EA file is corrupted -- re-download from your provider
• Wrong platform version -- .ex4 files only work on MT4, not MT5
• Missing dependencies -- check if additional files (.mqh, .dll) are required

Chart and Data Errors

Waiting for Update

The chart is not receiving price data. Right-click the chart and select Refresh, or close and reopen the chart. If it persists, the symbol may have been renamed or removed by your broker.

Symbol Not Found

The requested trading symbol is not available. In Market Watch, right-click and select "Show All" to display all available symbols. If XAUUSD is still missing, your account type may not support gold trading -- check with your broker.

No Data / Missing History

Historical price data is incomplete. Go to Tools → History Center (F2), find your symbol, and click Download. For EA backtesting, imported quality data is essential -- see our MT4 backtesting guide.

Account Errors

Trade Is Disabled

• Your broker has restricted trading on your account
• Market may be in pre/post-market hours
• Demo account may have expired
• Account may be set to "read-only" or "investor" mode
• Contact your broker to resolve

Invalid Account

Your login number, password, or server is incorrect. Re-enter credentials from your broker's email. Make sure you are selecting the correct server (live vs demo).

Error Prevention Checklist

Follow these practices to minimize MT4 errors:

• Keep MT4 updated -- install updates when your broker releases them
• Use a stable connection -- VPS is ideal for EA trading
• Monitor margin levels -- keep margin usage below 50% of free margin
• Check the Experts tab regularly -- errors appear here first
• Save EA presets -- restore quickly if settings are lost after an error
• Restart MT4 weekly -- clears memory leaks and refreshes connections
• Add MT4 to firewall exceptions -- prevents connection blocks
• Use proper lot sizes -- prevents "Not enough money" errors