The MyTrader platform contains examples of scripts, of a widget, and of a UDI (but not specifically a UDIX). You can use these as a starting point in addition to this guide.
The Run Script widget lets users without programming experience nevertheless create scripts from common actions such as placing trades, and then save those scripts for future use, make them accessible as icons in the software's banner etc.
The screen for adding a UDI to a trading chart includes an example UDI.
The External Widget contains a simple HTML example of a widget which displays a configurable market, current prices for that selected market, and a button for opening the platform's standard deal ticket.