So my mercury 29 degree is in sag has power in cap
This is somewhat different from Sign-blending, and can be used with it or by itself: "Orb-Influence", whereby an indicator's influence is expanded from a single, longitudinal point, to the full gradient of its allowable Orb.
So, with a 5 degree Orb, Mercury's influence extends 5 degrees from its pinpoint location in
both directions, for a total of 10 degrees.
Mercury is strongest at pinpoint, gradually weakening by degree until the 5 degree limit is reached.
An
"exact" Conjunction is when two pinpoint positions coincide. With a 5 degree Orb, the greatest allowable "Wide-Orb" Conjunction is with the pinpoint positions are separated by 5 degrees. Obviously, the tighter the Conjunction, the more the effect.
When Mercury's pinpoint location, for example, reaches within 5 degrees of a Sign in either direction, its Orb-Influence
gradually begins to activate that Sign's qualities, with increased activation the closer Mercury's pinpoint location gets to the 0 degree Sign-boundary. And, once it ingresses that Sign, it continues to have (gradually decreasing) Orb-Influence over the Sign it left behind until its pinpoint location is 5 degrees away from that Sign's boundary-line.