Android Crypto-Forex Grid Bot

I want to release a Google-Play trading app that runs both crypto and forex pairs using DCA and grid logic. The engine must let a user stack incremental buys or layered limit orders, then close everything automatically with configurable stop-loss / take-profit targets.

Beyond the core strategy, I need solid risk-management controls (max drawdown limits, exposure caps, etc.), a subscription tier handled through Google Play Billing, and a secure way for each trader to plug in their own exchange or broker account with API keys. All keys have to stay encrypted on-device and never touch an external server.

Interface wise, think simple: pair selection, parameter sliders, live PnL, and a log of executed orders. The app has to run smoothly on modern Android versions and be ready for submission to the Play Store, including compliance items such as privacy policy links and a working demo for review.

Deliverables I’ll sign off on:
• Production-ready APK + source code (Java/Kotlin or a performant cross-platform stack is fine)
• Tested integrations with at least one major crypto exchange (e.g., Binance) and one forex broker (e.g., OANDA)
• In-app subscription flow with a sandbox test showing renewals and cancellations
• Brief setup/run manual and stripped-down UML or flow chart that documents the trading logic

If you have a proven track record building automated trading tools and can get this through Play Store review, let’s talk timelines and milestones.