If you are a commercial vendor, you should never distribute the source code files even if your IP is contained within an assembly or proprietary DLL. Source code files are editable by users and can result in unnecessary support issues.
Please use a consistent naming convention with your indicators and strategies. We suggest adding a prefix to the name. If your company name is “Hyper” you could name your indicator “HyperTrend” or “HyperOscillator” for example.
If your proprietary indicator acts as a trend state (green bars are bullish, red bearish) its good practice to expose the indicators state so that consumers of your indicators can use them within their own custom indicator or strategy.
If your code has any public types or members, it's a good practice to document them with XML comments. This allows other developers to use IntelliSense to show quick information about those types or members and help them understand how to use them.
Some customers run on older Operating Systems (such as Windows 7) and you should make sure that your indicators, custom installers and external DLLs (if any are used) properly run on these legacy operating systems.