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... (Budget: ₹1500 - ₹12500 INR, Jobs: Android, Android App Development, API Integration, C# Programming, Java, Kotlin, Mobile App Development, PHP)