Call component method when service's signal updates

Let me preface this question with the fact that I started learning Angular about a month ago. Basically, I have a searchbar component and several different itemcontainer components (each of them displays a different type of item). In an attempt to have access to the serchbar value on any component, I created a searchbarService like so: import { Injectable, signal, WritableSignal } from '@angular/core'; @Injectable({ providedIn: 'root' }) export class SearchBarService { searchTextSignal: WritableSignal = signal(''); setSearch(text: string): void{ this.searchTextSignal.set(text); } } The searchbar component calls the setSearch method on input submit. So far so good. Now, the problem comes when trying to work with searchTextSignal on the itemcontainter components. I'm trying to use it like this: import { Component, signal} from '@angular/core'; import { Factura } from 'src/app/interfaces/factura'; import { FacturaService } from 'src/app/services/factura.service'; //gets items from a placeholder array. import { SearchBarService } from 'src/app/services/search-bar.service'; @Component({ selector: 'vista-facturas', templateUrl: './vista-facturas.component.html', styleUrls: ['./vista-facturas.component.css'] }) export class VistaFacturasComponent { facturasArray: Factura[] = []; // has all items filteredFacturasArray = signal([]); // has all filtered items, and is the value that I want to get updated when the signal changes. constructor(private facturaService: FacturaService, public searchBarService: SearchBarService) { } getFacturas(): void { //initializes the arrays. this.facturaService.getFacturas().subscribe(facturasReturned => this.facturasArray = facturasReturned); this.filteredFacturasArray.set(this.facturasArray); } filterFacturas(): void{ // this method is likely the problem let text = this.searchBarService.searchTextSignal(); if (!text) this.filteredFacturasArray.set(this.facturasArray); this.filteredFacturasArray.set(this.facturasArray.filter(factura => factura?.numero.toString().includes(text))); } ngOnInit(): void { this.getFacturas(); } } The templace uses ngFor like so: So, everything boils down to how to make VistaFacturasComponent call filterFacturas() when searchBarService.searchTextSignal() updates. Any ideas?