diff --git a/api/universal-parameters/mode.md b/api/universal-parameters/mode.md
index dc5543e0..92ba7f8b 100644
--- a/api/universal-parameters/mode.md
+++ b/api/universal-parameters/mode.md
@@ -51,7 +51,7 @@ Data freshness is not guaranteed. Symbols with higher usage across Market Data c
 * Bulk Candles: Unavailable
 * Other Endpoints: Unavailable
 
-This makes cached mode particularly cost-effective for bulk quote retrieval using endpoints such as [Option Chain](/api/options/chain) and [Bulk Stock Quotes](/api/stocks/bulkquotes).
+This makes cached mode particularly cost-effective for bulk quote retrieval using endpoints such as [Option Chain](/api/options/chain) and [Bulk Stock Quotes](/api/stocks/quotes).
 
 ### Requesting Cached Data
 
diff --git a/docusaurus.config.js b/docusaurus.config.js
index 0e822c4b..1ddaba91 100644
--- a/docusaurus.config.js
+++ b/docusaurus.config.js
@@ -64,7 +64,10 @@ const config = {
     ],
   ],
 
+  clientModules: ['./src/clientModules/themeCookieSync.js'],
+
   plugins: [
+    './plugins/theme-cookie-sync',
     [
       "@docusaurus/plugin-client-redirects",
       {
diff --git a/package.json b/package.json
index ba603e8a..b87fb2a9 100644
--- a/package.json
+++ b/package.json
@@ -21,6 +21,7 @@
     "@docusaurus/plugin-client-redirects": "3.0.1",
     "@docusaurus/plugin-content-docs": "3.0.1",
     "@docusaurus/preset-classic": "3.0.1",
+    "@marketdataapp/ui": "github:MarketDataApp/ui",
     "@mdx-js/react": "^3.0.0",
     "clsx": "^2.0.0",
     "dotenv": "^16.0.2",
diff --git a/plugins/theme-cookie-sync.js b/plugins/theme-cookie-sync.js
new file mode 100644
index 00000000..726b3b9f
--- /dev/null
+++ b/plugins/theme-cookie-sync.js
@@ -0,0 +1,15 @@
+module.exports = function themeCookieSyncPlugin() {
+    return {
+        name: 'theme-cookie-sync',
+        injectHtmlTags() {
+            return {
+                headTags: [
+                    {
+                        tagName: 'script',
+                        innerHTML: `(function(){var m=document.cookie.match(/(?:^|;\\s*)theme=(dark|light)/);if(m)try{localStorage.setItem('theme',m[1])}catch(e){}})();`,
+                    },
+                ],
+            };
+        },
+    };
+};
diff --git a/src/clientModules/themeCookieSync.js b/src/clientModules/themeCookieSync.js
new file mode 100644
index 00000000..98787ce7
--- /dev/null
+++ b/src/clientModules/themeCookieSync.js
@@ -0,0 +1,20 @@
+import { setThemeCookie } from '@marketdataapp/ui/theme';
+import ExecutionEnvironment from '@docusaurus/ExecutionEnvironment';
+
+if (ExecutionEnvironment.canUseDOM) {
+    const observer = new MutationObserver((mutations) => {
+        for (const mutation of mutations) {
+            if (mutation.attributeName === 'data-theme') {
+                const theme = document.documentElement.getAttribute('data-theme');
+                if (theme === 'dark' || theme === 'light') {
+                    setThemeCookie(theme);
+                }
+            }
+        }
+    });
+
+    observer.observe(document.documentElement, {
+        attributes: true,
+        attributeFilter: ['data-theme'],
+    });
+}
diff --git a/yarn.lock b/yarn.lock
index f8cc670d..75d75845 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1581,6 +1581,10 @@
   resolved "https://registry.npmjs.org/@leichtgewicht/ip-codec/-/ip-codec-2.0.4.tgz"
   integrity sha512-Hcv+nVC0kZnQ3tD9GVu5xSMR4VVYOteQIr/hwFPVEvPdlXqgGEuRjiheChHgdM+JyqdgNcmzZOX/tnl0JOiI7A==
 
+"@marketdataapp/ui@github:MarketDataApp/ui":
+  version "1.1.0"
+  resolved "https://codeload.github.com/MarketDataApp/ui/tar.gz/d83dfd362a12e3173f02eb2c31eb43f4a7379fed"
+
 "@mdx-js/mdx@^3.0.0":
   version "3.0.0"
   resolved "https://registry.npmjs.org/@mdx-js/mdx/-/mdx-3.0.0.tgz"