@ Juwita Sari:
- For gold (XAU/USD) contract size, the common contract size for 1 lot is 100 troy ounces (or about 3.1 kg). If the broker offers 2 contract sizes, please choose one of them. We recommend using the common contract size only.
- Regarding security in trading, we recommend choosing a broker that is already regulated by a credible international regulatory body, namely: CFTC, NFA, FCA, FSA, FINMA, MiFID, ASIC and FMA.
A credible regulatory body is one that has been tested and internationally recognized, and provides strict sanctions to brokers if they violate agreed-upon terms. The regulatory body is also responsible for the security of client funds.
Regarding InstaForex broker, please read: InstaForex Broker Profile and Review