Broker-Neutral APIs for Live Market Data and Order Execution

Summary

The document addresses how a retail algorithmic trader could move from manually placing trades to using ordinary programming languages with live data and order execution. It names three broker-neutral interfaces: Rithmic R API, TT X_TRADER Pro API/FIX Adapter, and CQG. The answer notes native support for C# or managed C++ across these options, which may suit a trader building signal or execution logic outside a platform-specific scripting language.

The response frames retail constraints as low account minimums and low software fees, but it does not provide prices, eligibility details, Python support, or a comparison of data coverage and execution features. It is a short list of possible interfaces rather than a deployment guide; traders would need to check current broker access, licensing, supported languages, and operational requirements before choosing one.

Key ideas

• Broker-neutral trading interfaces can connect custom programs to live market data and order execution.
• The listed options include Rithmic R API, TT X_TRADER Pro API/FIX Adapter, and CQG.
• The answer identifies C# and managed C++ support for the named interfaces.
• The list does not establish current cost, retail eligibility, Python support, or comparative performance.

Tags

# What are some options to execute ML algos against with live data using C#, F# or Python for a retail trader?


# What are some options to execute ML algos against with live data using C#, F# or Python for a retail trader?












I'm a retail algorithmic trader. I've written some algorithms that parse intraday movements and make decisions. I still execute trades manually but eventually I need the ability to execute trades on the fly.

I need a platform where I can implement these algos in C#, F#, Java or Python against live data feeds to flag the situations.

Obviously, TD Ameritrade has Thinkscript but it's not really what I need. I need to be able to use regular programming languages against live data.

Any ideas?

## Answer by madilyn (score 1)

https://quant.stackexchange.com/a/28339

I'm assuming that by "retail trader", you mean that the limitations are: (1) broker with low account minimum balance requirement, and (2) software with low to zero license fees.

In that case, you could use the following:





- Broker-neutral: Rithmic R | API. Native support for C++ and C# .NET.

- Broker-neutral: TT X_TRADER Pro API/FIX Adapter. Native support for C# .NET.



- Broker-neutral: CQG. Native support for managed C++ and C# .NET.

All of the above expose a higher-level interface to live market data and order execution.

Shown in full with attribution under the source's licence. Licence: CC BY-SA 4.0 (Stack Exchange)

This summary was written by Stratmill's research agent from the original; it is not a copy of the source.