As a developer building trading tools, I used to deal with a messy stack: separate APIs for US stocks, HK stocks, and precious metals. Code got messy, maintenance hurt, and data kept out of sync.
Today I’ll show you how to use one single Forex API to stream real-time prices for US equities, HK equities, and gold/silver — over one WebSocket connection. Copy-paste ready Python code included.

The Problem: Multi‑API Chaos
If you’ve built cross‑asset dashboards or trading bots, you know the pain:
Multiple APIs = multiple auth, rate limits, and error handlers
Inconsistent JSON structures = messy adapter code
Multiple WebSockets = more lag, more disconnects
Different symbol formats = silent failed subscriptions
I wanted: one connection, one format, one codebase.

Why a Forex API Works for All Assets
Many devs think Forex APIs = only currency pairs. Wrong.
Modern data providers combine stocks, forex, and commodities into one low‑latency tick stream using WebSocket.
Benefits:
Single auth & single connection
Unified data format
Less code, fewer bugs
Better sync for strategies

Symbol Rules You Must Follow
90% of subscription failures are wrong symbols.
US stocks: AAPL, MSFT
HK stocks: 00001.HK, 00002.HK (must include .HK)
Precious metals: XAUUSD, XAGUSD
Always validate before subscribing.

Full Working Code (Python)
Plug & play example using AllTick API.
`import websocket
import json

def on_message(ws, message):
data = json.loads(message)
symbol = data.get("symbol")
price = data.get("price")
print(f"{symbol} latest: {price}")

def on_open(ws):
subscribe_msg = {
"action": "subscribe",
"symbols": [
"AAPL", "MSFT",
"00001.HK", "00002.HK",
"XAUUSD", "XAGUSD"
]
}
ws.send(json.dumps(subscribe_msg))

Start real-time stream

ws = websocket.WebSocketApp(
"wss://api.alltick.co/ws/stock",
on_open=on_open,
on_message=on_message
)
ws.run_forever()`

Run it — you’ll get all assets in one stream.

Production Improvements for Devs
Classify & store data by asset type
Use dictionaries to separate US / HK / metals.
Filter by market hours
Skip processing during closed sessions to save CPU.
Unify price precision
Metals have more decimals — format consistently.
Add these for stability:
Async task queues
Auto‑reconnect with symbol resume
Structured logging

Why This Matters for Developers
Clean, maintainable architecture
Lower infrastructure overhead
Faster feature development
Easy to add new markets
Perfect for:
Trading bots
Market dashboards
Quant tools
Multi‑asset trackers

Wrap Up
You don’t need 3 different APIs to monitor global markets.
One API + one WebSocket = all your data in sync.
If you hate juggling data providers as much as I did, give this method a try.