rickdanoff on Instagram: "Orthogonal signals can be understood as independent sources of information that complement, rather than duplicate, a core momentum signal. When momentum is used as the primary regime classifier—determining whether markets are broadly in a risk-on or risk-off state—orthogonal macro signals can be layered on top to control leverage, timing, and position sizing without undermining the momentum framework itself. At the base level, a momentum regime classification typically

Linear subspaces

Orthogonal complements

Orthogonal Vectors and Subspaces | Linear Algebra | Mathematics | MIT OpenCourseWare

Suppose P is the projection matrix onto the subspace S and Q is the projection onto, the orthogonal complement 𝐒^⊥. What are P Q and P Q ? Show that P-Q is its own inverse. | Numerade