Rooster/Leo and Horse/Aquarius meet at 50-55%, a cross pairing of the manic cannonball and the high-minded eccentric. One crows and broods by turns; the other is already halfway into next decade, uninterested in the drama.
Rooster/Leo's fits of moody misbehavior are, paradoxically, its romantic bait, since it needs a partner who wants the bad seed; Horse/Aquarius is a dazzling, extravagant eccentric with calculated disdain for theatrics and the material world alike. The spark between two showy creatures is real, but the Horse will not play audience to the Rooster's weather.
The Rooster crows about its greatness; the Horse makes bold leaps of intuition and expects everyone to keep up. Neither listens well. Conversations turn into parallel broadcasts, and the Horse's irritable-crank days meet the Rooster's mirror-check moods head on.
The core mismatch: the Rooster runs on emotional weather and needs hugs when the gloom thickens; Horse/Aquarius is impractical, unchangeable, and will not be managed no matter how hard a partner tries. A soother-in-chief vacancy nobody fills.
If they persist, Rooster/Leo learns from the Horse to spend less time crowing and more time actually achieving great things, and Horse/Aquarius learns that grounded tenderness is not a betrayal of its lofty goals. Both stretch.
At 50-55%, Rooster/Leo and Horse/Aquarius are mismatched but possible. It takes a Rooster on its best days and a Horse in a patient season, and calendars rarely cooperate.