MT4 / MT5 Error Codes & Trading Tools

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.

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 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.

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.

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.

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.

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

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

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

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.

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.

Check permissions, sessions, symbol specifications, quotes and request parameters. Reproduce in a demo account. Do not retry rejected requests indefinitely.

Check permissions, sessions, symbol specifications, quotes and request parameters. Reproduce in a demo account. Do not retry rejected requests indefinitely.

Check permissions, sessions, symbol specifications, quotes and request parameters. Reproduce in a demo account. Do not retry rejected requests indefinitely.

Check permissions, sessions, symbol specifications, quotes and request parameters. Reproduce in a demo account. Do not retry rejected requests indefinitely.

Check permissions, sessions, symbol specifications, quotes and request parameters. Reproduce in a demo account. Do not retry rejected requests indefinitely.

Check permissions, sessions, symbol specifications, quotes and request parameters. Reproduce in a demo account. Do not retry rejected requests indefinitely.

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

Check permissions, sessions, symbol specifications, quotes and request parameters. Reproduce in a demo account. Do not retry rejected requests indefinitely.

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.

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.