求助：BitMEX中custom_strategy.py运行无响应，无测试网订单

Hey there, let's break down why your custom BitMEX trading bot is running without output or testnet orders—since your sample script worked, we can rule out basic setup issues like API key validity or network access. Let's walk through targeted checks:

1. Add Immediate Debugging Output #

First, confirm your script is even starting properly. Add a simple print statement at the very top of custom_strategy.py:

print("Custom strategy script initialized successfully!")

Run python custom_strategy.py again. If you still see nothing, your script might be failing before reaching your strategy logic (silent crashes are common with unhandled exceptions).

2. Catch Silent Exceptions #

Python won't automatically print unhandled errors, which could be crashing your script quietly. Wrap your core strategy logic in a try-except block to surface issues:

try:
    # Your full strategy code goes here
    print("Executing core strategy logic...")
    # ... rest of your code (API calls, order logic, etc.)
except Exception as e:
    print(f"Critical error encountered: {str(e)}")
    import traceback
    traceback.print_exc()  # Prints full error stack for debugging

This will show you exactly where the script is failing—like undefined variables, invalid API parameters, or permission issues.

3. Verify Testnet Configuration #

Double-check that your custom script is targeting the BitMEX testnet, not mainnet:

• Ensure your API keys were generated on the BitMEX Testnet (mainnet keys won't work here)
• Confirm your API client is configured for testnet. For example, if using the official bitmex SDK:

  from bitmex import bitmex
  # The `test=True` flag is critical here
  client = bitmex(test=True, api_key="YOUR_TESTNET_KEY", api_secret="YOUR_TESTNET_SECRET")
  

4. Validate Order Trigger Logic #

Your strategy might not be hitting the conditions to place an order. Add print statements to track market data and your trigger rules:

# Fetch current market price (adjust based on your data source)
current_price = client.Instrument.Instrument_get(symbol="XBTUSD").result()[0][0]['lastPrice']
your_entry_threshold = 50000  # Example threshold from your strategy

print(f"Current XBTUSD price: {current_price}")
print(f"Entry threshold set to: {your_entry_threshold}")

if current_price > your_entry_threshold:
    print("Order condition met—attempting to place buy order...")
    # Your order placement code here
else:
    print("Order condition not satisfied.")

This will confirm whether your script is even entering the order-placement branch.

5. Check API Request Validity #

BitMEX's API has strict parameter requirements (e.g., correct symbol format, order quantity precision). Wrap your order call in error handling to catch API-specific issues:

try:
    order_response = client.Order.Order_new(
        symbol="XBTUSD",
        orderQty=100,  # Adjust to valid contract size for testnet
        price=current_price + 100  # Example limit price
    ).result()
    print(f"Order submitted successfully! Response: {order_response}")
except Exception as e:
    print(f"API rejected order: {str(e)}")

Common issues here include missing required parameters, invalid quantity values, or insufficient API permissions (make sure your testnet keys have "Order" permissions enabled).

6. Check for Blocking Code #

If your script uses websockets or infinite loops, it might be stuck waiting for data without output. Add periodic print statements in loops to confirm execution is ongoing:

import time
while True:
    print("Polling market data...")
    # Your market data fetch/strategy logic here
    time.sleep(10)

内容的提问来源于stack exchange，提问作者Greg. Huang