Trade Manager, Risk-Based Trading with Advanced ATR Trailing Stop

I am looking for an experienced MQL developer to create an Expert Advisor for MetaTrader 4 and MetaTrader 5 with identical functionality on both platforms.
The EA is a manual execution assistant with advanced risk management, ATR-based trailing stop logic, and partial close functionality for manually closing of a percent of the position.  
The focus is on clean logic, stability, and correct trade management, not on indicators or strategy optimization.

1. Markets & Timeframe

• Works for Forex and Crypto

• Designed for the H4 (4-hour) timeframe

• No scalping or high-frequency logic

2. Trade Execution

• EA provides Buy and Sell buttons (inside the EA interface, not displayed on the chart)

• When a button is pressed, the EA executes the trade automatically

• Market orders only

3. Risk Management

The EA must support two risk modes:

1. Percentage Risk

   • Risk defined as % of account balance 

2. Fixed Amount Risk

   • Risk defined as a fixed currency amount (EUR / USD, depending on account)

Lot size must be calculated automatically based on:

• Risk setting

• Entry price

• Initial Stop Loss distance

4. Initial Stop Loss

The initial Stop Loss must support two methods:

1. ATR-based Stop Loss

2. Manual Stop Loss

   • User can enter an exact price level for the initial SL

. Trailing Stop Logic (R-Based)

• Trailing Stop is ATR-based

• The Stop Loss must trail price tick-by-tick from the moment the trade is opened

• Stop Loss moves only in profit direction

• Stop Loss must never move backwards

• Trailing Stop logic is evaluated on every tick

Trailing Stop Adjustments:

• From trade entry until +1R:

  • Trailing distance = 2 ATR Stop Loss distance

• At +1R profit:

  • Trailing Stop distance is reduced to 1.5 × ATR

• At +2R profit:

  • Trailing Stop distance is reduced to 1.0 × ATR

Direction logic:

• BUY:

  • New SL = Bid − (ATR × active multiplier)

• SELL:

  • New SL = Ask + (ATR × active multiplier)

6. Partial Close (Manual)

The EA must include manual partial close buttons:

• Button to close 50% of the open position

• Button to close 33% of the open position

• Button to close 25% of the open position

Rules:

• Works on the currently open position for the symbol

• Lot rounding must be handled correctly

• Must work on MT4 and MT5

7. Visuals

• No indicators or values displayed on the chart

• Buttons and controls must be part of the EA interface only

8. Magic Number

• The EA must support an optional Magic Number

• User can enable or disable Magic Number usage

9. Platform Compatibility

• The EA must be delivered for MetaTrader 4 and MetaTrader 5

• Functionality must be identical on both platforms

• Shared logic is acceptable, but platform-specific implementations are expected

• Clean, readable, and maintainable code is required

10. Deliverables

• Fully working MT4 EA

• Fully working MT5 EA

• Source code

• Short usage explanation (inputs & buttons)

11. Developer Requirements

• Proven experience with MT4 and MT5

• Experience with:

  • Risk-based position sizing

  • ATR calculations

  • Trailing stops

  • Partial closes

• Clear communication in English 

12. Testing

• EA must compile without errors

• No critical runtime errors

• Logic must behave the same on MT4 and MT5