MT5 · Trade return codes
MT5 10031 · No connection with the trade server | YI GOLD
TRADE_RETCODE_CONNECTION
Official meaning
No connection with the trade server
Possible causes · YI GOLD suggestions
Network, server response or authorization connection is delayed or interrupted.
Troubleshooting · YI GOLD suggestions
Inspect connectivity, logs and request time. Verify actual order status before bounded retries with backoff to avoid duplicate exposure after a timeout.