diff --git a/api.ts b/api.ts
index 98c77df..2bb44fe 100644
--- a/api.ts
+++ b/api.ts
@@ -37,10 +37,31 @@ function apply_guidance(doc: any) {
   for (let key of Object.keys(doc.hist)) {
     // Update each item in the current key with the most recent price
     updateWithMostRecentPrice(doc.hist[key]);
+    console.log(doc.chan[0]);
+    assignRelevanceIndicator(doc.hist[key], doc.chan[0], doc.v1ds, doc.v0ds);
   }
   return doc;
 }
 
+function assignRelevanceIndicator(items, channelFirstChar, v1ds, v0ds) {
+  for (let item of items) {
+    // Check if the first character of the item's channel matches the first character of the document's channel
+    let relevance = (item.chan === channelFirstChar) ? 'relevant' : 'not relevant';
+
+    // Further refine relevance based on v1ds and v0ds
+    if (v1ds === item.v1ds && relevance === 'relevant') {
+      relevance = 'most relevant'; // v1ds is more relevant than v0ds
+    } else if (v0ds === item.v0ds && relevance === 'relevant') {
+      relevance = 'relevant'; // v0ds is relevant but less so than v1ds
+    } else {
+      relevance = 'not relevant'; // Neither v1ds nor v0ds
+    }
+
+    // Assign the calculated relevance to the item
+    item.relevance = relevance;
+  }
+}
+
 // Function to update each item with the most recent price
 function updateWithMostRecentPrice(items) {
   for (let item of items) {