Rooster/Taurus and Horse/Libra meet at 50-55%, a cross pairing of grindstone and mirror. One is working through lunch to win in exactly the right way; the other is checking its reflection in the shop window on the way to lunch.
The attraction is obvious: Horse/Libra is the most physically beautiful of all the DoubleSign combinations, and Rooster/Taurus, all abrupt shell and soft liquid center, is not immune. But the Rooster wants excellence and effort, the ambulatory Versailles wants admiration, and neither currency converts easily into the other.
Rooster/Taurus speaks in deadlines and verdicts; Horse/Libra speaks in charm and reflection. The Rooster's take-no-prisoners bluntness reads as vulgarity to Libran polish, while the Horse's frippery reads as idleness to a bird that never stops working.
The friction is structural. The Rooster measures worth in finished work, the Horse in finished looks, and each privately suspects the other's ledger is empty. Vanity meets workaholism, and both are stubborn about their religion.
Horse/Libra has the potential to put real substance behind the facade, and a Rooster/Taurus partner is precisely the taskmaster for it; in return the Horse can teach the Rooster that Friday evenings exist. Both must actually want the lesson.
At 50-55%, Rooster/Taurus and Horse/Libra are mismatched but possible: beauty and diligence can trade gifts, but only with more patience than either naturally carries.