MT4 / MT5 Error Codes & Trading Tools

Check permitted terminal sandbox paths, names, access flags, formats and handles. Record open failures without granting permissive directory access.

Check permitted terminal sandbox paths, names, access flags, formats and handles. Record open failures without granting permissive directory access.

Check permitted terminal sandbox paths, names, access flags, formats and handles. Record open failures without granting permissive directory access.

Inspect terminal logs and the failing function return value. Check inputs, array bounds, resources, connectivity and required permissions against the official description.

Inspect terminal logs and the failing function return value. Check inputs, array bounds, resources, connectivity and required permissions against the official description.

Read the latest bid/ask and quote time. Check precision and allowed deviation; stop increasing exposure with stale quotes.

Inspect terminal logs and the failing function return value. Check inputs, array bounds, resources, connectivity and required permissions against the official description.

Inspect terminal logs and the failing function return value. Check inputs, array bounds, resources, connectivity and required permissions against the official description.

Inspect terminal logs and the failing function return value. Check inputs, array bounds, resources, connectivity and required permissions against the official description.

Inspect terminal logs and the failing function return value. Check inputs, array bounds, resources, connectivity and required permissions against the official description.

Check server time, gold trading sessions, holidays and terminal/EA permissions. Wait for availability instead of repeatedly retrying closed-market requests.

Verify chart ID, object existence and property types. Check creation/update results and avoid name collisions.

Verify chart ID, object existence and property types. Check creation/update results and avoid name collisions.

Verify chart ID, object existence and property types. Check creation/update results and avoid name collisions.

Verify chart ID, object existence and property types. Check creation/update results and avoid name collisions.

Verify chart ID, object existence and property types. Check creation/update results and avoid name collisions.

Verify chart ID, object existence and property types. Check creation/update results and avoid name collisions.

Inspect terminal logs and the failing function return value. Check inputs, array bounds, resources, connectivity and required permissions against the official description.

Verify chart ID, object existence and property types. Check creation/update results and avoid name collisions.

Verify symbol, timeframe, indicator handle, BarsCalculated and copied element counts. Wait for data availability rather than filling missing prices with zeros.

Verify symbol, timeframe, indicator handle, BarsCalculated and copied element counts. Wait for data availability rather than filling missing prices with zeros.

Verify symbol, timeframe, indicator handle, BarsCalculated and copied element counts. Wait for data availability rather than filling missing prices with zeros.

Verify symbol, timeframe, indicator handle, BarsCalculated and copied element counts. Wait for data availability rather than filling missing prices with zeros.

Inspect terminal logs and the failing function return value. Check inputs, array bounds, resources, connectivity and required permissions against the official description.

Inspect terminal logs and the failing function return value. Check inputs, array bounds, resources, connectivity and required permissions against the official description.

Compare each argument and reference mode with the official signature. Validate ranges and preserve relevant failure context.

Inspect terminal logs and the failing function return value. Check inputs, array bounds, resources, connectivity and required permissions against the official description.

Serialize account requests, verify previous outcomes, reduce frequency and use bounded backoff.

Inspect terminal logs and the failing function return value. Check inputs, array bounds, resources, connectivity and required permissions against the official description.

Inspect terminal logs and the failing function return value. Check inputs, array bounds, resources, connectivity and required permissions against the official description.

Inspect connectivity, logs and request time. Verify actual order status before bounded retries with backoff to avoid duplicate exposure after a timeout.

Inspect connectivity, logs and request time. Verify actual order status before bounded retries with backoff to avoid duplicate exposure after a timeout.

Inspect terminal logs and the failing function return value. Check inputs, array bounds, resources, connectivity and required permissions against the official description.

Check permitted terminal sandbox paths, names, access flags, formats and handles. Record open failures without granting permissive directory access.

Inspect terminal logs and the failing function return value. Check inputs, array bounds, resources, connectivity and required permissions against the official description.

Check permitted terminal sandbox paths, names, access flags, formats and handles. Record open failures without granting permissive directory access.

Check permitted terminal sandbox paths, names, access flags, formats and handles. Record open failures without granting permissive directory access.

Check permitted terminal sandbox paths, names, access flags, formats and handles. Record open failures without granting permissive directory access.

Check permitted terminal sandbox paths, names, access flags, formats and handles. Record open failures without granting permissive directory access.

Reduce recursion and large local arrays, review allocation/release, batch history processing and check memory-operation results.