This is a small command line utility that displays last trade price in USD for Litecoin and Bitcoin in BTC-E.

cryptoticker.go

package main

import (
	"fmt"
	"io/ioutil"
	"net/http"
	"encoding/json"
	"time"
)

type Data struct {
	Last float64
}

type Ticker struct {
	Ticker Data
}

type Prices struct {
	Btc float64
	Ltc float64
}

func getPrice(Pair string) float64 {

	time.Sleep(300 * time.Millisecond) //without a wait the API blocks access

	resp, err := http.Get("http://btc-e.com/api/2/" + Pair + "/ticker")
	if err != nil {
		return -2
	}
	defer resp.Body.Close()
	
	body, err := ioutil.ReadAll(resp.Body)
	
	var apidata Ticker
	
	err = json.Unmarshal(body, &apidata)
	if err != nil {
		return -1
	}
	
	return apidata.Ticker.Last
}

func getLtcPrice(c chan float64){
	c <- getPrice("ltc_usd")
}

func getBtcPrice(c chan float64){
	c <- getPrice("btc_usd")
}

func main() {
	var last Prices

	btcChan := make(chan float64)
	ltcChan := make(chan float64)

	go getBtcPrice(btcChan)
	go getLtcPrice(ltcChan)

	last.Btc = <- btcChan
	last.Ltc = <- ltcChan

	fmt.Printf("BTC: %f\tLTC: %f\t", last.Btc, last.Ltc)

	go getBtcPrice(btcChan)
	go getLtcPrice(ltcChan)

	for {

		select {
			case last.Btc = <- btcChan :
				go getBtcPrice(btcChan)
			case last.Ltc = <- ltcChan :
				go getLtcPrice(ltcChan)				
		}

		fmt.Print("\r                           ")
		fmt.Print("\r")
		fmt.Printf("BTC: %f\tLTC: %f\t", last.Btc, last.Ltc)
		
	}
}