Why isn't my Expert Advisor working on Vantage MT4 or MT5?
An Expert Advisor (EA) may not operate as expected because its file is incompatible, automated trading is disabled, the platform is disconnected or its programmed trading conditions have not been met.
Start with the check that matches the issue you see.
Why does my Expert Advisor not appear in Navigator?
- Select File → Open Data Folder.
- Confirm that the file is saved in the correct folder:
- MT4:
MQL4 → Experts - MT5:
MQL5 → Experts
- MT4:
- Confirm that the file is compatible with your platform.
- Return to Navigator → Expert Advisors and select Refresh, or restart the platform.
MT4 Expert Advisors cannot run on MT5, or vice versa.
For installation steps, see “How do I install and enable an Expert Advisor on Vantage MT4 or MT5?”
Why is my Expert Advisor not placing trades?
Check the following:
- Platform permission: Confirm that automated trading is enabled.
- Expert Advisor permission: Review the trading permissions in the program’s settings.
- Chart attachment: Confirm that the Expert Advisor is attached to the intended instrument’s chart.
- Configuration: Review its input parameters and programmed trading conditions.
- Connection: Confirm that the platform is connected to the trading server.
- Account conditions: Check applicable trading permissions, margin requirements and account restrictions.
An Expert Advisor may be attached and enabled without opening a trade if its programmed entry conditions have not been met.
What happens if the platform closes or disconnects?
A locally running Expert Advisor requires the platform to remain open and connected to submit trading instructions.
| Item | What happens during disconnection |
|---|---|
| New trading instructions | The Expert Advisor cannot submit them to the trading server. |
| Existing positions | They remain on the trading server. |
| Server-side pending orders | They remain subject to their applicable conditions. |
After reconnection, the Expert Advisor’s behaviour depends on its programming and settings.
For connection checks, please refer to How do I fix ‘No Connection’ in Vantage Meta Trader 4 or Meta Trader 5?
Who should I contact if the Expert Advisor still does not work?
For third-party Expert Advisor installation, configuration or functionality issues, contact the Expert Advisor provider.
The provider can help review the program’s requirements, settings and intended behaviour.