MT4 / MT5 Error Codes & Trading Tools

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

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

Check bid/ask, point, digits, stops_level and freeze_level. Recalculate distances; do not remove protection merely to force a fill.

Read volume_min, volume_max, volume_step and volume_limit for the actual symbol. Round down to the step; do not send an order below minimum volume.

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

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

Check actual account denomination, free margin, volume and leverage. Calculate margin in the terminal and assess reduced exposure or genuine funding. Do not repeatedly submit the same request.

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

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

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

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

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.

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.

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 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 length, bounds, dynamic-array declarations and ArraySetAsSeries. Validate returned element counts before access.

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

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

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

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

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

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

Check length, bounds, dynamic-array declarations and ArraySetAsSeries. Validate returned element counts before access.

Check length, bounds, dynamic-array declarations and ArraySetAsSeries. Validate returned element counts before access.

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

Check denominators before division, remainder and return calculations. Distinguish missing data from true zero and report an explicit invalid state.

Check denominators before division, remainder and return calculations. Distinguish missing data from true zero and report an explicit invalid state.

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 length, bounds, dynamic-array declarations and ArraySetAsSeries. Validate returned element counts before 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.

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