Why is the closing point of spot gold sometimes not my stop loss or take profit price?

You need to understand that financial products, including futures and spot products, are traded at the market price, so requesting an order (especially take profit or stop loss) will be sent to the market after the order is triggered, and then traded at the market price. This process may be affected by different factors, such as physical distance, network reasons, actual market environment, etc., which may cause the price at the actual transaction time to be inconsistent with the price at the time of submitting the order, which is also a common market transaction situation.