diff --git a/cron/generateCustomData.php b/cron/generateCustomData.php
new file mode 100644
index 0000000..5be2bc0
--- /dev/null
+++ b/cron/generateCustomData.php
@@ -0,0 +1,63 @@
+<?php
+if (php_sapi_name() != "cli")
+  exit();
+
+require_once(__DIR__."/../config/config.php");
+require_once(__DIR__."/includes/generation.php");
+
+// Funció que retorna el nombre d'habitants a les ABS donades via una
+// API de la Generalitat de Catalunya
+function habitants($abs) {
+  $data = query("SELECT sum(poblacio_oficial) AS habitants
+  WHERE
+    abs_codi in(".implode(",", array_map(function($abs) { return "'".$abs."'"; }, $abs)).") AND
+    any = 2020", "ftq4-h9vk");
+
+  return ($data[0]["habitants"] ?? null);
+}
+
+if (isset($conf["customAreas"])) {
+  // A cada ciutat
+  foreach ($conf["customAreas"] as $area) {
+    // Si no hi ha cap ABS configurada no fem res
+    if (count($area["abs"]) == 0) {
+      echo "[Warning] There aren't any ABS configured for ".$area["name"].".\n";
+      continue;
+    }
+
+    // Demanem una llista del nombre de casos cada dia
+    $data = query("SELECT data, sum(numcasos) AS sum_numcasos
+    WHERE
+      resultatcoviddescripcio = 'Positiu PCR' AND
+      abscodi in(".implode(",", array_map(function($abs) { return "'".$abs."'"; }, $area["abs"])).")
+    GROUP BY data
+    ORDER BY data ASC
+    LIMIT 50000");
+
+    // Obtenim el nombre d'habitants a les ABS
+    $habitants = habitants($area["abs"]);
+    if ($habitants === null) {
+      echo "[Fatal error] Failed getting population for ".$area["name"].".\n";
+      continue;
+    }
+
+    // Generem les dades
+    $summary = generateSummary($data, $habitants);
+
+    // Les escribim en un fitxer
+    $file = tmpfile();
+    $fileName = stream_get_meta_data($file)['uri'];
+
+    foreach ($summary as $row)
+      fwrite($file, $row["data"]." ".$row["ia14"]." ".$row["rho7"]."\n");
+
+    // Cridem al gnuplot perquè generi la gràfica
+    shell_exec("gnuplot -c generateCustomGraph.gnu \"".escapeshellcmd($area["name"])."\" \"".escapeshellcmd($area["codename"])."\" \"".escapeshellcmd($fileName)."\"");
+    rename("/tmp/covid19graphgenerator-area-".$area["codename"]."-graph.png", __DIR__."/../output/area-".$area["codename"]."-graph.png");
+    rename("/tmp/covid19graphgenerator-area-".$area["codename"]."-graph.svg", __DIR__."/../output/area-".$area["codename"]."-graph.svg");
+
+    fclose($file);
+  }
+} else {
+  echo "[Warning] The config/customAreas.php file doesn't define the customAreas field.";
+}