Hi,
The 'cusp rule' is full of if's, but's and and's, especially regarding the outer planets whose orbits are so slow that they spend a lot of time in retrograde motion.
I follow a simple 'celestial' rule; a planet is where it is for a reason. Not a 'man-made' rule that puts it where it isn't.
Any query in your case is that Scorpio is on the 5th house cusp, through which Pluto becomes important in later life as its modern ruler. At your age, Mars is its ruler.
Natal Pluto is retrograde in the chart. It is approx. .60mins of a degree from the 5th house cusp. House cusps are often taken from 'City centre'. Depending upon how large a city Tarragona is, the district in which you were born could make a difference to the house cusp position.
Assuming the 5th house cusp is where it is, Pluto is .60mins from it. Pluto's daily motion is VERY slow, moving at approx. .2mins. of a degree per day. It would conceiveiably cross into the 5th house around your 30th year.
BUT, Pluto's motion is not direct at your date of birth. It has long been in retrograde motion. Using secondary progressions (1day after birth = 1 year progressed) and s.p.house cusps, Pluto continues
to move further back into the 4th house until yourmid-40's. You'll hopefully be enjoying your septenarian years when it finally crosses the 5th house cusp.
How can Pluto be said to be working in the 5th house from birth??? It is not 'celestially' possible. The non-quadrant whole sign or equal house systems place Pluto firmly in the 4th house. You would have to check with the various other house systems to see if any place it in the 5th house.
Pluto's rulership may later have strong significance over 5th house affairs, yet, using Placidus house cusps its implications are in the 4th house. E.g. An inherited family-ancestral trait (4th-12th house) that influences the power of an emotionally instigated mind (Mercury trine Pluto) in dealing with rational concepts (trine in Earth). A 4th house Pluto works and builds up emotion from within; a 5th house Pluto will express it outwardly.
As
Katydid already mentioned, Saturn
retrograde square Pluto's fixed signs may suggest seemingly immoveable (mentally [ir]rational)walls to climb and overcome where inner, as well as outer authority and control are concerned,