diff --git a/lib/cache.js b/lib/cache.js
new file mode 100644
index 00000000..e69de29b
diff --git a/lib/plugins.js b/lib/plugins.js
index ada7c84c..5f5f70af 100644
--- a/lib/plugins.js
+++ b/lib/plugins.js
@@ -3,7 +3,6 @@
 const fs = require('fs')
 const uuid = require('uuid')
 const R = require('ramda')
-const async = require('async')
 const HKDF = require('node-hkdf-sync')
 const BigNumber = require('bignumber.js')
 
@@ -170,7 +169,7 @@ exports.loadOrConfigPlugin = loadOrConfigPlugin
 exports.configure = function configure (config) {
   cachedConfig = config
 
-  const cryptoCodes = getCryptoCodes()
+  const cryptoCodes = getAllCryptoCodes()
 
   return configManager.loadAccounts()
   .then(accounts => {
@@ -187,7 +186,7 @@ exports.configure = function configure (config) {
         {currency: deviceCurrency},
         function onTickerChange (newTicker) {
           tickerPlugins[cryptoCode] = newTicker
-          pollRate(cryptoCode)
+          cache.clearRate()
         }
       )
 
@@ -475,10 +474,8 @@ function monitorUnnotified () {
 exports.startPolling = function startPolling () {
   executeTrades()
 
-  const cryptoCodes = getCryptoCodes()
+  const cryptoCodes = getAllCryptoCodes()
   cryptoCodes.forEach(cryptoCode => {
-    setInterval(async.apply(pollBalance, cryptoCode), POLLING_RATE)
-    setInterval(async.apply(pollRate, cryptoCode), POLLING_RATE)
     startTrader(cryptoCode)
   })
 
@@ -541,37 +538,6 @@ function pollBalance (cryptoCode) {
   })
 }
 
-function pollRate (cryptoCode, cb) {
-  const tickerPlugin = tickerPlugins[cryptoCode]
-  logger.debug('[%s] polling for rates (%s)', cryptoCode, tickerPlugin.NAME)
-
-  let currencies = deviceCurrency
-  if (typeof currencies === 'string') currencies = [currencies]
-
-  const tickerF = cryptoCode === 'BTC'
-  ? async.apply(tickerPlugin.ticker, currencies)
-  : async.apply(tickerPlugin.ticker, currencies, cryptoCode)
-
-  tickerF((err, resRates) => {
-    if (err) {
-      logger.error(err)
-      return cb && cb(err)
-    }
-
-    resRates.timestamp = Date.now()
-    const rates = resRates[deviceCurrency].rates
-    if (rates) {
-      rates.ask = rates.ask && new BigNumber(rates.ask)
-      rates.bid = rates.bid && new BigNumber(rates.bid)
-    }
-    logger.debug('[%s] got rates: %j', cryptoCode, resRates)
-
-    lastRates[cryptoCode] = resRates
-
-    return cb && cb(null, lastRates)
-  })
-}
-
 /*
  * Getters | Helpers
  */
@@ -589,12 +555,8 @@ exports.getDeviceRate = function getDeviceRate (cryptoCode) {
 function purchase (trade, cb) {
   const cryptoCode = trade.cryptoCode
   const traderPlugin = traderPlugins[cryptoCode]
-  const opts = {
-    cryptoCode,
-    fiat: deviceCurrency
-  }
 
-  traderPlugin.purchase(trade.cryptoAtoms, opts, err => {
+  traderPlugin.purchase(trade.cryptoAtoms, deviceCurrency, cryptoCode, err => {
     if (err) return cb(err)
     pollBalance(cryptoCode)
     if (typeof cb === 'function') cb()
diff --git a/lib/ticker.js b/lib/ticker.js
new file mode 100644
index 00000000..e69de29b
diff --git a/package.json b/package.json
index e742b8be..e34a6770 100644
--- a/package.json
+++ b/package.json
@@ -7,7 +7,6 @@
   "author": "Lamassu (https://lamassu.is)",
   "dependencies": {
     "ajv": "^4.9.0",
-    "async": "^2.1.2",
     "bignumber.js": "^3.0.0",
     "body-parser": "^1.15.1",
     "express": "^4.13.4",
@@ -16,6 +15,7 @@
     "lamassu-bitcoind": "https://github.com/lamassu/lamassu-bitcoind/tarball/alpha",
     "lamassu-bitgo": "https://github.com/lamassu/lamassu-bitgo/tarball/alpha",
     "lamassu-bitpay": "~1.0.0",
+    "lamassu-bitstamp": "https://github.com/lamassu/lamassu-bitstamp/tarball/alpha",
     "lamassu-coindesk": "^1.0.4",
     "lamassu-mailjet": "^1.0.0",
     "lamassu-mock-id-verify": "^1.0.1",