diff --git a/assets/css/app.css b/assets/css/app.css
index 01246c38..641706bb 100644
--- a/assets/css/app.css
+++ b/assets/css/app.css
@@ -105,4 +105,156 @@
 /* Make LiveView wrapper divs transparent for layout */
 [data-phx-session], [data-phx-teleported-src] { display: contents }
 
+/* Markdown rendered content */
+.markdown-content {
+  max-width: 64rem;
+  margin: 2rem auto;
+  padding: 0 1rem;
+  line-height: 1.75;
+}
+
+.markdown-content h1 {
+  font-size: 2rem;
+  font-weight: 700;
+  margin: 2rem 0 1rem;
+  border-bottom: 1px solid oklch(80% 0 0);
+  padding-bottom: 0.5rem;
+}
+
+.markdown-content h2 {
+  font-size: 1.5rem;
+  font-weight: 700;
+  margin: 1.75rem 0 0.75rem;
+  border-bottom: 1px solid oklch(85% 0 0);
+  padding-bottom: 0.25rem;
+}
+
+.markdown-content h3 {
+  font-size: 1.25rem;
+  font-weight: 600;
+  margin: 1.5rem 0 0.5rem;
+}
+
+.markdown-content h4 {
+  font-size: 1.1rem;
+  font-weight: 600;
+  margin: 1.25rem 0 0.5rem;
+}
+
+.markdown-content p {
+  margin: 0.75rem 0;
+}
+
+.markdown-content ul, .markdown-content ol {
+  margin: 0.75rem 0;
+  padding-left: 2rem;
+}
+
+.markdown-content ul { list-style-type: disc; }
+.markdown-content ol { list-style-type: decimal; }
+
+.markdown-content li {
+  margin: 0.25rem 0;
+}
+
+.markdown-content code {
+  font-family: ui-monospace, monospace;
+  font-size: 0.875em;
+  background: oklch(92% 0 0);
+  padding: 0.15em 0.35em;
+  border-radius: 0.25rem;
+}
+
+.markdown-content pre {
+  margin: 1rem 0;
+  padding: 1rem;
+  background: oklch(20% 0.01 260);
+  color: oklch(95% 0 0);
+  border-radius: 0.5rem;
+  overflow-x: auto;
+}
+
+.markdown-content pre code {
+  background: none;
+  padding: 0;
+  font-size: 0.85em;
+  color: inherit;
+}
+
+.markdown-content table {
+  width: 100%;
+  border-collapse: collapse;
+  margin: 1rem 0;
+  font-size: 0.9em;
+  overflow-x: auto;
+  display: block;
+}
+
+.markdown-content th, .markdown-content td {
+  border: 1px solid oklch(80% 0 0);
+  padding: 0.5rem 0.75rem;
+  text-align: left;
+}
+
+.markdown-content th {
+  background: oklch(94% 0 0);
+  font-weight: 600;
+}
+
+.markdown-content tr:nth-child(even) {
+  background: oklch(97% 0 0);
+}
+
+.markdown-content hr {
+  border: none;
+  border-top: 2px solid oklch(85% 0 0);
+  margin: 2rem 0;
+}
+
+.markdown-content strong {
+  font-weight: 700;
+}
+
+.markdown-content blockquote {
+  border-left: 4px solid oklch(70% 0.15 260);
+  margin: 1rem 0;
+  padding: 0.5rem 1rem;
+  background: oklch(96% 0.005 260);
+}
+
+.markdown-content a {
+  color: oklch(55% 0.2 260);
+  text-decoration: underline;
+}
+
+:where([data-theme=dark]) .markdown-content code {
+  background: oklch(30% 0.01 260);
+}
+
+:where([data-theme=dark]) .markdown-content th {
+  background: oklch(30% 0.01 260);
+}
+
+:where([data-theme=dark]) .markdown-content tr:nth-child(even) {
+  background: oklch(25% 0.01 260);
+}
+
+:where([data-theme=dark]) .markdown-content th,
+:where([data-theme=dark]) .markdown-content td {
+  border-color: oklch(40% 0 0);
+}
+
+:where([data-theme=dark]) .markdown-content h1,
+:where([data-theme=dark]) .markdown-content h2 {
+  border-color: oklch(40% 0 0);
+}
+
+:where([data-theme=dark]) .markdown-content hr {
+  border-color: oklch(40% 0 0);
+}
+
+:where([data-theme=dark]) .markdown-content blockquote {
+  background: oklch(25% 0.01 260);
+}
+
 /* This file is for your main application CSS */
diff --git a/assets/js/propagation_map_hook.js b/assets/js/propagation_map_hook.js
index 6dd6a856..5889a140 100644
--- a/assets/js/propagation_map_hook.js
+++ b/assets/js/propagation_map_hook.js
@@ -1,3 +1,5 @@
+import topbar from "../vendor/topbar"
+
 export const PropagationMap = {
   mounted() {
     this.map = L.map(this.el, {
@@ -24,9 +26,13 @@ export const PropagationMap = {
     ]
 
     this.handleEvent("update_scores", ({ scores }) => {
+      topbar.hide()
       this.renderScores(scores)
     })
 
+    // Show topbar whenever the server is processing a band change
+    this.el.addEventListener("show-loading", () => topbar.show(300))
+
     // Send bounds to server on load and on pan/zoom
     this.sendBounds()
     this.map.on("moveend", () => this.sendBounds())
@@ -168,6 +174,7 @@ export const PropagationMap = {
   },
 
   sendBounds() {
+    topbar.show(300)
     const b = this.map.getBounds()
     this.pushEvent("map_bounds", {
       south: b.getSouth(),
diff --git a/lib/microwaveprop_web/live/algo_live.ex b/lib/microwaveprop_web/live/algo_live.ex
new file mode 100644
index 00000000..3ed9a763
--- /dev/null
+++ b/lib/microwaveprop_web/live/algo_live.ex
@@ -0,0 +1,25 @@
+defmodule MicrowavepropWeb.AlgoLive do
+  @moduledoc false
+  use MicrowavepropWeb, :live_view
+
+  @algo_path Path.join(:code.priv_dir(:microwaveprop), "../algo.md")
+
+  @impl true
+  def mount(_params, _session, socket) do
+    content =
+      @algo_path
+      |> File.read!()
+      |> Earmark.as_html!()
+
+    {:ok, assign(socket, page_title: "Algorithm", content: content)}
+  end
+
+  @impl true
+  def render(assigns) do
+    ~H"""
+    <div class="markdown-content">
+      {raw(@content)}
+    </div>
+    """
+  end
+end
diff --git a/lib/microwaveprop_web/live/map_live.ex b/lib/microwaveprop_web/live/map_live.ex
index 5143ffc1..0ddc0c66 100644
--- a/lib/microwaveprop_web/live/map_live.ex
+++ b/lib/microwaveprop_web/live/map_live.ex
@@ -117,7 +117,8 @@ defmodule MicrowavepropWeb.MapLive do
             <li :for={band <- @bands}>
               <button
                 phx-click={
-                  JS.push("select_band", value: %{value: band.freq_mhz})
+                  JS.dispatch("show-loading", to: "#propagation-map")
+                  |> JS.push("select_band", value: %{value: band.freq_mhz})
                   |> JS.dispatch("click", to: "#propagation-map")
                 }
                 class={[if(@selected_band == band.freq_mhz, do: "active")]}
diff --git a/lib/microwaveprop_web/router.ex b/lib/microwaveprop_web/router.ex
index b4cfd872..0ff1e2a8 100644
--- a/lib/microwaveprop_web/router.ex
+++ b/lib/microwaveprop_web/router.ex
@@ -23,6 +23,7 @@ defmodule MicrowavepropWeb.Router do
     live "/map", MapLive
     live "/qsos", QsoLive.Index
     live "/qsos/:id", QsoLive.Show
+    live "/algo", AlgoLive
   end
 
   # Other scopes may use custom stacks.
diff --git a/mix.exs b/mix.exs
index 6b279370..38e31237 100644
--- a/mix.exs
+++ b/mix.exs
@@ -63,7 +63,8 @@ defmodule Microwaveprop.MixProject do
       {:bandit, "~> 1.5"},
       {:styler, "~> 1.11", only: [:dev, :test], runtime: false},
       {:oban, "~> 2.19"},
-      {:credo, "~> 1.7", only: [:dev, :test], runtime: false}
+      {:credo, "~> 1.7", only: [:dev, :test], runtime: false},
+      {:earmark, "~> 1.4"}
     ]
   end
 
diff --git a/mix.lock b/mix.lock
index a527dae9..e83afa72 100644
--- a/mix.lock
+++ b/mix.lock
@@ -6,6 +6,7 @@
   "db_connection": {:hex, :db_connection, "2.9.0", "a6a97c5c958a2d7091a58a9be40caf41ab496b0701d21e1d1abff3fa27a7f371", [:mix], [{:telemetry, "~> 0.4 or ~> 1.0", [hex: :telemetry, repo: "hexpm", optional: false]}], "hexpm", "17d502eacaf61829db98facf6f20808ed33da6ccf495354a41e64fe42f9c509c"},
   "decimal": {:hex, :decimal, "2.3.0", "3ad6255aa77b4a3c4f818171b12d237500e63525c2fd056699967a3e7ea20f62", [:mix], [], "hexpm", "a4d66355cb29cb47c3cf30e71329e58361cfcb37c34235ef3bf1d7bf3773aeac"},
   "dns_cluster": {:hex, :dns_cluster, "0.2.0", "aa8eb46e3bd0326bd67b84790c561733b25c5ba2fe3c7e36f28e88f384ebcb33", [:mix], [], "hexpm", "ba6f1893411c69c01b9e8e8f772062535a4cf70f3f35bcc964a324078d8c8240"},
+  "earmark": {:hex, :earmark, "1.4.48", "5f41e579d85ef812351211842b6e005f6e0cef111216dea7d4b9d58af4608434", [:mix], [], "hexpm", "a461a0ddfdc5432381c876af1c86c411fd78a25790c75023c7a4c035fdc858f9"},
   "ecto": {:hex, :ecto, "3.13.5", "9d4a69700183f33bf97208294768e561f5c7f1ecf417e0fa1006e4a91713a834", [:mix], [{:decimal, "~> 2.0", [hex: :decimal, repo: "hexpm", optional: false]}, {:jason, "~> 1.0", [hex: :jason, repo: "hexpm", optional: true]}, {:telemetry, "~> 0.4 or ~> 1.0", [hex: :telemetry, repo: "hexpm", optional: false]}], "hexpm", "df9efebf70cf94142739ba357499661ef5dbb559ef902b68ea1f3c1fabce36de"},
   "ecto_sql": {:hex, :ecto_sql, "3.13.5", "2f8282b2ad97bf0f0d3217ea0a6fff320ead9e2f8770f810141189d182dc304e", [:mix], [{:db_connection, "~> 2.4.1 or ~> 2.5", [hex: :db_connection, repo: "hexpm", optional: false]}, {:ecto, "~> 3.13.0", [hex: :ecto, repo: "hexpm", optional: false]}, {:myxql, "~> 0.7", [hex: :myxql, repo: "hexpm", optional: true]}, {:postgrex, "~> 0.19 or ~> 1.0", [hex: :postgrex, repo: "hexpm", optional: true]}, {:tds, "~> 2.1.1 or ~> 2.2", [hex: :tds, repo: "hexpm", optional: true]}, {:telemetry, "~> 0.4.0 or ~> 1.0", [hex: :telemetry, repo: "hexpm", optional: false]}], "hexpm", "aa36751f4e6a2b56ae79efb0e088042e010ff4935fc8684e74c23b1f49e25fdc"},
   "elixir_make": {:hex, :elixir_make, "0.9.0", "6484b3cd8c0cee58f09f05ecaf1a140a8c97670671a6a0e7ab4dc326c3109726", [:mix], [], "hexpm", "db23d4fd8b757462ad02f8aa73431a426fe6671c80b200d9710caf3d1dd0ffdb"},
diff --git a/test/microwaveprop_web/live/algo_live_test.exs b/test/microwaveprop_web/live/algo_live_test.exs
new file mode 100644
index 00000000..d1f31d6b
--- /dev/null
+++ b/test/microwaveprop_web/live/algo_live_test.exs
@@ -0,0 +1,23 @@
+defmodule MicrowavepropWeb.AlgoLiveTest do
+  use MicrowavepropWeb.ConnCase, async: true
+
+  import Phoenix.LiveViewTest
+
+  describe "mount" do
+    test "renders algo page with markdown content as HTML", %{conn: conn} do
+      {:ok, _lv, html} = live(conn, ~p"/algo")
+
+      # algo.md starts with this heading
+      assert html =~ "Microwave Propagation Algorithm"
+      # Earmark should convert ## headings to h2 tags
+      assert html =~ "<h2>"
+      # Should contain code blocks rendered as HTML
+      assert html =~ "<code"
+    end
+
+    test "sets page title", %{conn: conn} do
+      {:ok, _lv, html} = live(conn, ~p"/algo")
+      assert html =~ "Algorithm"
+    end
+  end
+end