MT4 · Runtime errors
MT4 131 · Invalid trade volume | YI GOLD
ERR_INVALID_TRADE_VOLUME
Official meaning
Invalid trade volume
Possible causes · YI GOLD suggestions
Volume falls outside symbol minimum, maximum, step or directional aggregate limits.
Troubleshooting · YI GOLD suggestions
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.