Each reading is built from that day's real sky: the Moon's sign and phase, the planets' signs, retrogrades and sign changes, and which house of your sign each one is in. It names the transits it uses, and it changes every day. There are no luck scores.
A Sun-sign horoscope counts the signs from yours: your sign is the first house, the next sign the second, and so on. Each house has its own theme, such as money, conversation, home, love or work, and the readings are written for the house a transit is in, so they differ from sign to sign. Positions come from the same astronomy engine as the birth chart calculator, and dates follow your own calendar day where your browser allows.
For your fuller picture, calculate your birth chart or find your rising sign.