Missing from the documentation link, as far as I can recall, are,
Common Mathematical Operators such as =, <, >, <=, >=, <> [pdf page 24]
https://www.prorealtime.com/en/pdf/probuilder.pdf
BorderColour(r,g,b,a) ‘Draw’ing modifer, can be used to fill some objects.
New drawing commands, Anchor, Index, Value and the load of anchor points, see link.
https://www.prorealcode.com/topic/new-drawing-instructions-anchoring-in-pixels/
A few additional links to keep you busy.
https://www.prorealcode.com/topic/array-variables-availability-in-prorealtime/
https://www.prorealcode.com/topic/multi-timeframe-mtf-indicators-for-prorealtime/
Thanks for all the Info and examples you’ve posted Nicolas.