Expert Advisor (EA) that implements a grid trading strategy

I need an Expert Advisor (EA) that implements a grid trading strategy with these specific rules:

1. Initial Entry: Only opens the first position when no trades exist for the symbol, triggered by either MACD crossover OR Moving Average crossover (or both - user configurable).

2. Grid Logic: After the initial position, the EA adds trades in both directions based on price movement:

   • If first trade was BUY: Adds another BUY when price moves up X pips, adds first SELL when price moves down X pips

   • If first trade was SELL: Adds another SELL when price moves down X pips, adds first BUY when price moves up X pips

3. Limits: Separate maximum counts for BUY and SELL positions (including the initial trade).

4. Requirements: Fully configurable parameters for indicator settings, grid spacing (in pips), and position limits.