1. Subscribe to Dual Currency
App-Pro → Invest → Dual Currency → Select a mode (Standard, Popular) → （Buy Below Market、Sell Above Market） → Select a crypto you want to buy（BTC、ETH） → Subscription page → Set parameters (maturity, strike price, investment amount) → Reconfirm → Complete
2. View order and history
App-Pro → Invest → Dual Currency → Ongoing order(s) → Current/Completed → Order history → Details