The Forewarnings are always the Benchmarks of the Main Character Throughline, and the Requirements are always the Benchmarks of the Overall Throughline. The Story Engine can't control them directly, but you can mess with them in the Query System (under Storyforming/Plot for the Overall Dynamics and Storyforming/Theme for the Benchmarks).
Alternatively, you can just memorize the Benchmark table I gave you guys! So, off the top of my head, Change/Start/Logical/Decision/Failure/Good/Situation/Future has a Forewarning of... Planning, I believe. But now I'm just showing off.