The Experts and Journal tabs are the first reliable place to investigate an EA that is silent, rejects an order or behaves differently after a VPS migration. A screenshot of the chart alone rarely shows whether the problem occurred in the strategy, terminal, account or broker layer.
Experts vs Journal
The Experts and Journal tabs are the first reliable place to investigate an EA that is silent, rejects an order or behaves differently after a VPS migration. A screenshot of the chart alone rarely shows whether the problem occurred in the strategy, terminal, account or broker layer.
Experts mainly records messages written by Expert Advisors and indicators. Journal records broader terminal activity: connection changes, order requests, server responses, startup events and platform errors. The useful evidence is the sequence across both tabs, not one isolated line.
The same server error can have different causes. Timestamp, requested price, volume, symbol properties and the preceding messages determine the correct fix.
Common messages
| Message | What it means | Next check |
|---|---|---|
| AutoTrading disabled | The terminal or EA is not permitted to send trades | Enable AutoTrading and Allow live trading; confirm the icon and smiley |
| Invalid account / license | The file is not authorized for the current account | Send the exact MT4 account number to the vendor and install the correct EX4 |
| Error 130 / invalid stops | SL, TP or pending price violates symbol rules | Check Stops Level, digits, spread and order direction |
| Error 131 / invalid volume | Lot size does not match account limits | Check minimum lot, lot step, maximum lot and free margin |
| Off quotes / requote | The requested price is unavailable or changed | Check connection, spread, market state and execution frequency |
| Trade context busy | Another trade operation is still being processed | Remove duplicate terminals or allow the EA to retry safely |
| No connection / authorization failed | The terminal cannot maintain a valid server session | Check VPS network, server selection, credentials and broker status |
Diagnostic workflow
Reproduce once without changing inputs
Note the server time, symbol, timeframe and expected action. Repeatedly changing settings destroys the evidence chain.
Read Experts around the signal
Look for the EA name, initialization result, license response, filters and the exact order parameters it attempted to use.
Match the same timestamp in Journal
Find the terminal or broker response. Record the order type, price, volume, error number and connection messages before and after it.
Classify the layer
Decide whether the issue is setup, EA logic, account permission, symbol specification, connection or broker execution.
Change one variable and retest
Apply one justified correction on Demo. If several settings are changed together, the successful fix cannot be identified.
Evidence to save
Safe operating rule
Save the Experts and Journal files immediately after the incident, together with screenshots of EA Inputs, chart symbol and timeframe, Account History and Market Watch Specification. Remove passwords and personal information, but keep account type, server name and relevant order numbers when support needs them.