How to Code a Trading EA Using ChatGPT & DeepSeek (Free Step-by-Step Guide)

FvkK...t6VS

17 Dec 2025

Many traders think that building a trading robot (Expert Advisor – EA) requires deep programming knowledge.
In reality, with the help of AI tools like ChatGPT and DeepSeek, you can start coding your own EA for free, even as a beginner.

Step 1: Clearly Define Your Trading Strategy

Before asking any AI to write code, you must be clear about your strategy.
Example:

Market: Forex / Gold (XAUUSD)
Timeframe: M1 / M5
Indicators: CCI, ADX, EMA
Rules:
- BUY when CCI crosses above +100
- SELL when CCI crosses below -100
- Fixed SL / TP or risk–reward ratio
- One trade at a time or DCA logic

The clearer your logic, the better the code.

Step 2: Use ChatGPT to Generate the Base EA

ChatGPT is excellent for:

Creating EA structure (OnInit, OnTick)
Writing clean MQL4 / MQL5 logic
Explaining how the code works

Example prompt:

“Write a simple MT5 EA for XAUUSD using CCI. Buy when CCI crosses above +100, sell when below -100, with fixed SL and TP.”

ChatGPT helps you get a solid starting version very quickly.

Step 3: Use DeepSeek to Fix Errors & Optimize

DeepSeek is extremely strong at:

Fixing compile errors and warnings
Handling large EA files (1000+ lines)
Improving logic performance
Optimizing DCA, trailing stop, anti-spam logic

I often paste error messages or full EA code into DeepSeek and ask:

“Fix all compile errors and logic issues, keep the original strategy.”

This saves hours of debugging.

Step 4: Backtest & Improve Step by Step

After compiling successfully:

Run Strategy Tester in MetaTrader
Check entry accuracy
Look for overtrading or missed trades
Adjust filters (spread, time, trend)

Then repeat:
Backtest → Ask AI → Improve → Backtest again

Why This Method Works

✔ Completely free
✔ No advanced coding background required
✔ Faster development than learning MQL from scratch
✔ Perfect for traders who want custom bots
AI does not replace thinking — it accelerates execution.

Final Thoughts

If you are a trader with ideas but limited coding skills, ChatGPT + DeepSeek is a powerful combination.
You focus on strategy and risk management, while AI handles the technical work.
This is one of the most practical ways to enter algorithmic trading today.

link blog here :https://ea-fx-gold.blogspot.com/