Some of Daniel 8 is in the past. I think verses 1-8 describe the Medo-Persian empire being overthrown by Alexander the Great. Then him quickly dying and 4 families that jockeyed for power.
I think verse 9 is the transition to the future. Often times the little horn is seen as the historical figure of Antiochus IV Epiphanes, but biblical prophecies often transition from the past to the future as a single flow. The Little Horn is a theme we seen in Daniel and other parts of scripture that reference the Antichrist. Check out Names of the Antichrist. I believe vs 9-27 are future.