The official website for Juan Felipe Orozco's Colombian horror movie At the End of the Spectra (Al final del espectro) is online, and there's a downloadable English-subtitled trailer for the movie on that site.
The screenplay for At the End of the Spectra was written by Juan Felipe Orozco and his younger brother Carlos Esteban Orozco. The movie stars Noelle Schonwald as Vega, Julieth Restrepo as Vega's neighbour, and Kepa Amuchastegui as Vega's father. It co-stars Silvia de Dios, Manuel José Chávez, and Carlos Serrato.
Here's a synopsis for At the End of the Spectra from the website of the Ministry of Culture of the Republic of Colombia (Ministerio de Cultura de la República de Colombia): "After a highly traumatic event, due to which she becomes the victim of extreme agoraphobia, Vega (Noelle Schonwald) is forced to spend some time far away from work. By her father's (Kepa Amuchastegui) recommendation, she decides to move to a new apartment, where she begins living as a hermit, abruptly changing her lifestyle. She begins having strange visions with no explanations, and hearing voices she can't ignore. While her horrible visions intensify, Vega begins to understand a dark puzzle, and to know the power of the supernatural. A series of explosive situations, a sinister presence in her apartment, her neighbor's (Julieth Restrepo) deeply bizarre obsession, and an uncertain past take the story to a chilling and claustrophobic conclusion, where the mind itself becomes victim and executioner."
At the End of the Spectra trailer (English subtitled; downloadable 16.3 MB MOV file)
At the End of the Spectra official website