MT4 · Trade return codes
MT4 129 · Invalid price | YI GOLD
ERR_INVALID_PRICE
Official meaning
Invalid price
Possible causes · YI GOLD suggestions
Quotes have changed, are missing or use incompatible price precision.
Troubleshooting · YI GOLD suggestions
Read the latest bid/ask and quote time. Check precision and allowed deviation; stop increasing exposure with stale quotes.