diff --git a/bin/ssu b/bin/ssu
index 057a4e1e..dfe761b2 100755
--- a/bin/ssu
+++ b/bin/ssu
@@ -19,7 +19,7 @@ function bail () {
   console.log('Command line utility for lamassu-server')
   console.log('\nssu reboot <machine-fingerprint>')
   console.log('This will remotely reboot your lamassu-machine.')
-  console.log('\nssu crypto <code> <ticker-plugin> <wallet-plugin>')
+  console.log('\nssu crypto <code> <ticker-plugin> <wallet-plugin> [<trader-plugin>]')
   console.log('This will configure a new cryptocurrency.')
   process.exit(1)
 }
@@ -115,9 +115,10 @@ function crypto () {
   var code = argv[1]
   var tickerPlugin = argv[2]
   var walletPlugin = argv[3]
+  var traderPlugin = argv[4]
 
   if (!code || !tickerPlugin || !walletPlugin) {
-    console.log('\nssu crypto <code> <ticker-plugin> <wallet-plugin>')
+    console.log('\nssu crypto <code> <ticker-plugin> <wallet-plugin> [<trader-plugin>]')
     console.log('This will configure a new cryptocurrency.')
     process.exit(1)
   }
@@ -137,7 +138,8 @@ function crypto () {
     var config = data.data
     config.exchanges.plugins.current[code] = {
       ticker: tickerPlugin,
-      transfer: walletPlugin
+      transfer: walletPlugin,
+      trader: traderPlugin
     }
     config.exchanges.settings.coins = ['BTC', code]
     return db.none('update user_config set data=$1 where type=$2', [config, 'exchanges'])
diff --git a/lib/plugins.js b/lib/plugins.js
index 64980173..fb7c7808 100644
--- a/lib/plugins.js
+++ b/lib/plugins.js
@@ -9,7 +9,7 @@ BigNumber.config({DECIMAL_PLACES: 40})
 var logger = require('./logger')
 var argv = require('minimist')(process.argv.slice(2))
 
-var tradeInterval = null
+var tradeIntervals = {}
 
 var POLLING_RATE = 60 * 1000 // poll each minute
 var REAP_RATE = 2 * 1000
@@ -183,11 +183,11 @@ exports.configure = function configure (config) {
       }
     )
 
-    tradesQueues[cryptoCode] = []
+    tradesQueues[cryptoCode] = tradesQueues[cryptoCode] || []
 
     loadOrConfigPlugin(
       traderPlugins[cryptoCode],
-      'trade',
+      'trader',
       cryptoCode,
       null,
       function onTraderChange (newTrader) {
@@ -334,13 +334,13 @@ exports.trade = function trade (session, rawTrade, cb) {
   // add bill to trader queue (if trader is enabled)
   var cryptoCode = rawTrade.cryptoCode || 'BTC'
   var traderPlugin = traderPlugins[cryptoCode]
-  var tradesQueue = tradesQueues[cryptoCode]
 
   if (traderPlugin) {
-    tradesQueue.push({
+    logger.debug('[%s] Pushing trade: %d', cryptoCode, rawTrade.cryptoAtoms)
+    tradesQueues[cryptoCode].push({
       currency: rawTrade.currency,
       cryptoAtoms: rawTrade.cryptoAtoms,
-      cryptoCode: rawTrade.cryptoCode
+      cryptoCode: cryptoCode
     })
   }
 
@@ -417,11 +417,10 @@ exports.startPolling = function startPolling () {
   cryptoCodes.forEach(function (cryptoCode) {
     setInterval(async.apply(pollBalance, cryptoCode), POLLING_RATE)
     setInterval(async.apply(pollRate, cryptoCode), POLLING_RATE)
+    startTrader(cryptoCode)
   })
 
   setInterval(reapTxs, REAP_RATE)
-
-  startTrader()
 }
 
 function startTrader (cryptoCode) {
@@ -430,21 +429,23 @@ function startTrader (cryptoCode) {
   // `Trader#executeTrades` returns early if we don't have a trade exchange
   // configured at the moment.
   var traderPlugin = traderPlugins[cryptoCode]
+  if (!traderPlugin || tradeIntervals[cryptoCode]) return
 
-  if (traderPlugin && !tradeInterval) {
-    tradeInterval = setInterval(
-      function () { executeTrades(cryptoCode) },
-      cachedConfig.exchanges.settings.tradeInterval
-    )
-  }
+  logger.debug('[%s] startTrader', cryptoCode)
+
+  tradeIntervals[cryptoCode] = setInterval(
+    function () { executeTrades(cryptoCode) },
+    cachedConfig.exchanges.settings.tradeInterval
+  )
 }
 
 function stopTrader (cryptoCode) {
-  if (tradeInterval) {
-    clearInterval(tradeInterval)
-    tradeInterval = null
-    tradesQueues[cryptoCode] = []
-  }
+  if (!tradeIntervals[cryptoCode]) return
+
+  logger.debug('[%s] stopTrader', cryptoCode)
+  clearInterval(tradeIntervals[cryptoCode])
+  tradeIntervals[cryptoCode] = null
+  tradesQueues[cryptoCode] = []
 }
 
 function pollBalance (cryptoCode, cb) {
@@ -536,8 +537,11 @@ function purchase (trade, cb) {
 
 function consolidateTrades (cryptoCode) {
   // NOTE: value in cryptoAtoms stays the same no matter the currency
+
+  logger.debug('tradesQueues size: %d', tradesQueues[cryptoCode].length)
+  logger.debug('tradesQueues head: %j', tradesQueues[cryptoCode][0])
   var cryptoAtoms = tradesQueues[cryptoCode].reduce(function (prev, current) {
-    return current.cryptoAtoms.plus(prev)
+    return prev.plus(current.cryptoAtoms)
   }, new BigNumber(0))
 
   var consolidatedTrade = {
@@ -548,7 +552,7 @@ function consolidateTrades (cryptoCode) {
 
   tradesQueues[cryptoCode] = []
 
-  logger.debug('consolidated: ', JSON.stringify(consolidatedTrade))
+  logger.debug('[%s] consolidated: %j', cryptoCode, consolidatedTrade)
   return consolidatedTrade
 }
 
@@ -556,21 +560,23 @@ function executeTrades (cryptoCode) {
   var traderPlugin = traderPlugins[cryptoCode]
   if (!traderPlugin) return
 
-  logger.debug('checking for trades')
+  logger.debug('[%s] checking for trades', cryptoCode)
 
   var trade = consolidateTrades(cryptoCode)
 
   if (trade.cryptoAtoms.eq(0)) {
-    logger.debug('rejecting 0 trade')
+    logger.debug('[%s] rejecting 0 trade', cryptoCode)
     return
   }
 
   logger.debug('making a trade: %d', trade.cryptoAtoms.toString())
   purchase(trade, function (err) {
     if (err) {
+      logger.debug(err)
       tradesQueues[cryptoCode].push(trade)
       if (err.name !== 'orderTooSmall') logger.error(err)
     }
+    logger.debug('Successful trade.')
   })
 }
 
diff --git a/todo.txt b/todo.txt
index db724706..3f235870 100644
--- a/todo.txt
+++ b/todo.txt
@@ -30,5 +30,17 @@ alter table pending_transactions alter satoshis TYPE bigint;
 alter table bills add crypto_code text default 'BTC';
 alter table bills alter satoshis TYPE bigint;
 
+- handle geth send failure better
+- unlock geth account
 - remove debug
-- test trading
+- implement coin selection screen
+- ask neal to work on config scripts
+
+TypeError: Cannot read property 'rates' of null
+    at /Users/josh/projects/lamassu-server/lib/routes.js:36:49
+    at Array.forEach (native)
+    at buildRates (/Users/josh/projects/lamassu-server/lib/routes.js:35:15)
+    at poll (/Users/josh/projects/lamassu-server/lib/routes.js:66:15)
+    at callbacks (/Users/josh/projects/lamassu-server/node_modules/express/lib/router/index.js:164:37)
+    at /Users/josh/projects/lamassu-server/lib/app.js:56:7
+    at /Users/josh/projects/lamassu-server/node_modules/lamassu-config/lib/main.js:142:5