Mr Schmidt,
In your interesting welcome & position statement you write as follows:
Fifthly, I do not think that Hellenistic Astrology was intended to be a divinatory art by its founders, if by divination we mean a way of understanding the will of the gods (as the Babylonians evidently understood their astrology). One of the reasons I hold this opinion is the lack of anything like horary astrology in our surviving sources, horary being arguably a divinatory application of astrology. I maintain instead that it was developed as a discipline for rendering human life intelligible (and meaningful) in the manner of a Classical Greek epistēmē—that is, a way of coming to knowledge about a given human life as a whole.
In saying there is a lack of anything like horary astrology in surviving sources, you have I believe forgotten the fifth book of Dorotheus:
V 35, the 138 verses deal with whether the owner will recover what was lost or stolen;
V 36, 80 verses which deal with repossession of a runaway.
There are also katarches from Palchus at the following places in CCAG:
1 p. 100-101: rulership of the prefect Theodoros;
1 p. 102: a voyage by ship;
1 p. 103: concerning fear of a journey to Athens;
1 p. 103/104: fear about the late arrival of a ship from Alexandria;
6 p. 63-64: receipt of distressing letters;
6 p. 64-65: concerning the lost linen of a slave girl;
6 p. 65-66: whether a small lion will be tamed;
6 p. 66-67: coronation of Leontius.
I believe both Dorotheus and Palchus are considered within Classical Greek Astrology. Dorotheus certainly predates both Ptolemy and Valens.