How do I pass a const to my scope - node.js

Question

I m trying to use the node-binance-api to retreive cryptocurency value.
I am able to get the information and display it in the node console.
Im doing so like this;
var express = require('express');
var app = express();
var mongo = require('mongodb');
var db = require('mongojs')("mongodb://URL")
var nodeBinanceApi = require("node-binance-api");
const binance = require('node-binance-api')().options({
APIKEY: '***',
APISECRET: '***',
useServerTime: true, // If you get timestamp errors, synchronize to server time at startup
test: true // If you want to use sandbox mode where orders are simulated
});
app.use(function(req, res, next) {
res.header("Access-Control-Allow-Origin", "*");
res.header("Access-Control-Allow-Methods", "GET,PUT,POST,DELETE");
res.header("Access-Control-Allow-Headers", "Origin, X-Requested-With, Content-Type, Accept");
next();
});
binance.prices((error, ticker) => {
console.log("Price: ", ticker); <--------------------------
console.log("Price of BTC: ", ticker.BTCUSDT);
});
app.use(express.static(__dirname + '/www'));
app.listen(81);
I would like to pass the json information in ticker to my scope in another script on the page. Should i use routes? and the use get request in the scope?
It does work with routes!
I added
app.get('/crypto', function(req, res){
//calling the function
binance.prices((error, ticker) => {
res.jsonp(ticker);
console.log(ticker);
});
return;
});
Now I can see the prices of all cryptosurrency on my page!