Documentation

Check out this:

I'd suggest you try in this order:

1. Search for relevant keywords through the Documentation, as sometimes the information you are looking for is a small snippet on some other page. When you see the "three small cubes" icon, make sure you click on it for more information.
2. Look at Example/Demonstration Algorithms
3. If all else fails, dig through the public LEAN repository 

Thanks Adam. I don't see the BB description you quoted on the link you sent. Also tried different browsers.

I did find the description on https://www.quantconnect.com/lean/documentation/topic28393.html

A bit suspicious there is something not right shown in my browser when I go to quantconnect sites. The Tutorial and Videos link at the bottom of the pages do not work and amis there really an apostrophe in the BB description, i.e. ...Func`2[Data.... ?

Thanks.

Have discovered the API tab in the coding environment. This has good documentation.