How could I use a Triggered item in expression of a Run-Always Item, as it then becomes Run-Always as well?
Goal was to trigger when the value changed more than 10, hence I created a trigger item to log memory value of last trigger, and a run-always expression to compare that memory value and the current value.
No, transaction groups themselves have no generic way to evaluate using prior values. You might find the state dictionary useful in the objectScript() expression function (part of my free Simulation Aids module) to create your own tracker for prior values.