Position sizing on gold
One standard lot of XAUUSD is 100 ounces, so a $1 move equals $100 per lot. On a $100K account risking 1% ($1,000) with a $10 stop, that is 1 lot. Use the risk calculator in the order panel to size every trade automatically.
When gold moves
Gold is most active during the London and New York sessions and around US inflation, employment and Fed decisions. Spreads can widen at the release moment.