Minor changes to logic, was retrying after queue pop

src/api.js

@@ -7,17 +7,19 @@ const queue = new PQueue({ interval: 1000, intervalCap: 10 });
 
 export async function fetchRate(pair) {
   const key = pair.toUpperCase();
+  const max_retries = 3;
 
-  return queue.add(async () => {
-    for (let attempt = 1; attempt <= 3; attempt++) {
+  for (let attempt = 1; attempt <= max_retries; attempt++) {
     let timeout;
     try {
+      const res = await queue.add(async () => {
         const controller = new AbortController();
         timeout = setTimeout(() => controller.abort(), 5000);
 
-        const res = await fetch(`https://api.uphold.com/v0/ticker/${key}`, {
+        return fetch(`https://api.uphold.com/v0/ticker/${key}`, {
           signal: controller.signal,
         });
+      });
 
       clearTimeout(timeout);
 
@@ -46,7 +48,6 @@ export async function fetchRate(pair) {
       await new Promise((r) => setTimeout(r, 500 * Math.pow(2, attempt - 1)));
     }
   }
-  });
 }
 
 export async function prefetchRates(pairs) {

src/bot.js

@@ -39,6 +39,7 @@ export class Bot {
         this.lastPrice = price;
         logger.info(`[${this.pair}] Initial price: ${price.toFixed(2)}`);
       } else {
+        // Using BigNumber
         const change = price
           .minus(this.lastPrice)
           .dividedBy(this.lastPrice)
@@ -69,6 +70,7 @@ export class Bot {
           };
 
           try {
+            // onAlert must be fast
             await this.onAlert(alertData);
           } catch (err) {
             logger.error(