diff --git a/extensions/strategies/ta_ema/strategy.js b/extensions/strategies/ta_ema/strategy.js
index 92de028c2b..70c9d08148 100644
--- a/extensions/strategies/ta_ema/strategy.js
+++ b/extensions/strategies/ta_ema/strategy.js
@@ -19,7 +19,6 @@ module.exports = {
   },
 
   calculate: function (s) {
-    ta_ema(s, 'trend_ema', s.options.trend_ema)
     if (s.options.oversold_rsi) {
       // sync RSI display with oversold RSI periods
       s.options.rsi_periods = s.options.oversold_rsi_periods
@@ -29,9 +28,6 @@ module.exports = {
         if (s.options.mode !== 'sim' || s.options.verbose) console.log(('\noversold at ' + s.period.oversold_rsi + ' RSI, preparing to buy\n').cyan)
       }
     }
-    if (s.period.trend_ema && s.lookback[0] && s.lookback[0].trend_ema) {
-      s.period.trend_ema_rate = (s.period.trend_ema - s.lookback[0].trend_ema) / s.lookback[0].trend_ema * 100
-    }
     if (s.options.neutral_rate === 'auto') {
       stddev(s, 'trend_ema_stddev', Math.floor(s.options.trend_ema / 2), 'trend_ema_rate')
     }
@@ -50,6 +46,20 @@ module.exports = {
         return cb()
       }
     }
+
+    // wait for promise to be resolved
+    // we add all maybe we need more indicators
+    Promise.all([ta_ema(s, s.options.trend_ema)]).then(result => {
+      if(result && result.outReal) {
+        s.period.trend_ema = result.outReal;
+      }
+    });
+
+    // calculate ema rate
+    if (s.period.trend_ema && s.lookback[0] && s.lookback[0].trend_ema) {
+      s.period.trend_ema_rate = (s.period.trend_ema - s.lookback[0].trend_ema) / s.lookback[0].trend_ema * 100
+    }
+
     if (typeof s.period.trend_ema_stddev === 'number') {
       if (s.period.trend_ema_rate > s.period.trend_ema_stddev) {
         if (s.trend !== 'up') {
diff --git a/extensions/strategies/ta_macd/strategy.js b/extensions/strategies/ta_macd/strategy.js
index 0262fe899b..9bc98520de 100644
--- a/extensions/strategies/ta_macd/strategy.js
+++ b/extensions/strategies/ta_macd/strategy.js
@@ -30,18 +30,6 @@ module.exports = {
         if (s.options.mode === 'sim' && s.options.verbose) console.log(('\noverbought at ' + s.period.overbought_rsi + ' RSI, preparing to sold\n').cyan)
       }
     }
-
-    // compture MACD
-    /*get('lib.ema')(s, 'ema_short', s.options.ema_short_period)
-      get('lib.ema')(s, 'ema_long', s.options.ema_long_period)
-      if (s.period.ema_short && s.period.ema_long) {
-        s.period.macd = (s.period.ema_short - s.period.ema_long)
-        get('lib.ema')(s, 'signal', s.options.signal_period, 'macd')
-        if (s.period.signal) {
-          s.period.macd_histogram = s.period.macd - s.period.signal
-        }
-      }*/
-    ta_macd(s,'macd','macd_histogram','macd_signal',s.options.ema_long_period,s.options.ema_short_period,s.options.signal_period)
   },
 
   onPeriod: function (s, cb) {
@@ -54,16 +42,32 @@ module.exports = {
       }
     }
 
-    if (typeof s.period.macd_histogram === 'number' && typeof s.lookback[0].macd_histogram === 'number') {
-      if ((s.period.macd_histogram - s.options.up_trend_threshold) > 0 && (s.lookback[0].macd_histogram - s.options.up_trend_threshold) <= 0) {
-        s.signal = 'buy'
-      } else if ((s.period.macd_histogram + s.options.down_trend_threshold) < 0 && (s.lookback[0].macd_histogram + s.options.down_trend_threshold) >= 0) {
-        s.signal = 'sell'
-      } else {
-        s.signal = null  // hold
+    ta_macd(s, s.options.ema_long_period, s.options.ema_short_period, s.options.signal_period).then(function(signal) {
+      if(!signal) {
+        cb()
+        return
       }
-    }
-    cb()
+
+      s.period['macd'] = signal.macd
+      s.period['macd_histogram'] = signal.macd_histogram
+      s.period['macd_signal'] = signal.macd_signal
+
+      if (typeof s.period.macd_histogram === 'number' && typeof s.lookback[0].macd_histogram === 'number') {
+        if ((s.period.macd_histogram - s.options.up_trend_threshold) > 0 && (s.lookback[0].macd_histogram - s.options.up_trend_threshold) <= 0) {
+          s.signal = 'buy'
+        } else if ((s.period.macd_histogram + s.options.down_trend_threshold) < 0 && (s.lookback[0].macd_histogram + s.options.down_trend_threshold) >= 0) {
+          s.signal = 'sell'
+        } else {
+          s.signal = null  // hold
+        }
+      }
+
+      cb()
+    }).catch(function(error) {
+      console.log(error)
+      cb()
+    })
+
   },
 
   onReport: function (s) {
diff --git a/lib/ta_ema.js b/lib/ta_ema.js
index 2e6a48afd9..f33970234d 100644
--- a/lib/ta_ema.js
+++ b/lib/ta_ema.js
@@ -1,49 +1,59 @@
 var talib = require('talib')
 
-module.exports = function ta_ema (s, key, length) {
-  //create object for talib. only close is used for now but rest might come in handy
-  if (!s.marketData) {
-    s.marketData = { open: [], close: [], high: [], low: [], volume: [] }
-  }
-  if (s.lookback.length > s.marketData.close.length) {
-    for (var i = (s.lookback.length - s.marketData.close.length) - 1; i >= 0; i--) {
-      //console.log('add data')
-      s.marketData.close.push(s.lookback[i].close)
+module.exports = function ta_ema (s, length) {
+  return new Promise(function(resolve, reject) {
+    // create object for talib. only close is used for now but rest might come in handy
+    if (!s.marketData) {
+      s.marketData = { open: [], close: [], high: [], low: [], volume: [] }
     }
-    //dont calculate until we have enough data
-    if (s.marketData.close.length >= length) {
-      //fillup marketData for talib.
-      //this might need improvment for performance.
-      //for (var i = 0; i < length; i++) {
-      //  s.marketData.close.push(s.lookback[i].close);
-      //}
-      //fillup marketData for talib.
-      var tmpMarket = JSON.parse(JSON.stringify(s.marketData.close))
-      //add current period
-      tmpMarket.push(s.period.close)
 
-      //doublecheck length.
-      if (tmpMarket.length >= length) {
-        talib.execute({
-          name: 'EMA',
-          startIdx: 0,
-          endIdx: tmpMarket.length -1,
-          inReal: tmpMarket,
-          optInTimePeriod: length
-        }, function (err, result) {
-          if (err) {
-            console.log(err)
-            return
-          }
-          //Result format: (note: outReal can have multiple items in the array)
-          // {
-          //   begIndex: 8,
-          //   nbElement: 1,
-          //   result: { outReal: [ 1820.8621111111108 ] }
-          // }
-          s.period[key] = result.result.outReal[(result.nbElement - 1)]
-        })
+    if (s.lookback.length > s.marketData.close.length) {
+      for (var i = (s.lookback.length - s.marketData.close.length) - 1; i >= 0; i--) {
+        s.marketData.close.push(s.lookback[i].close)
+      }
+
+      //dont calculate until we have enough data
+      if (s.marketData.close.length >= length) {
+        //fillup marketData for talib.
+        //this might need improvment for performance.
+        //for (var i = 0; i < length; i++) {
+        //  s.marketData.close.push(s.lookback[i].close);
+        //}
+        //fillup marketData for talib.
+        let tmpMarket = s.marketData.close.slice()
+
+        //add current period
+        tmpMarket.push(s.period.close)
+
+        //doublecheck length.
+        if (tmpMarket.length >= length) {
+          talib.execute({
+            name: 'EMA',
+            startIdx: 0,
+            endIdx: tmpMarket.length -1,
+            inReal: tmpMarket,
+            optInTimePeriod: length
+          }, function (err, result) {
+            if (err) {
+              console.log(err)
+              reject(err, result)
+              return
+            }
+
+            //Result format: (note: outReal can have multiple items in the array)
+            // {
+            //   begIndex: 8,
+            //   nbElement: 1,
+            //   result: { outReal: [ 1820.8621111111108 ] }
+            // }
+            resolve({
+              'outReal': result.result.outReal[(result.nbElement - 1)],
+            })
+          })
+        }
+      } else {
+        resolve()
       }
     }
-  }
+  })
 }
diff --git a/lib/ta_macd.js b/lib/ta_macd.js
index b1949c942b..274080884c 100644
--- a/lib/ta_macd.js
+++ b/lib/ta_macd.js
@@ -1,55 +1,61 @@
 var talib = require('talib')
 
-module.exports = function macd (s, macd_key,hist_key,sig_key, slow_period,fast_period,signal_period) {
-  //check parameters
-  // if (fast_period > slow_period) {
-  //   console.log('incorrect parameters MACD. (fast_period < slow_period || signal_period > fast_period)')
-  //   return;
-  // }
-  //create object for talib. only close is used for now but rest might come in handy
-  if (!s.marketData) {
-    s.marketData = { open: [], close: [], high: [], low: [], volume: [] }
-  }
-  if (s.lookback.length > s.marketData.close.length) {
-    for (var i = (s.lookback.length - s.marketData.close.length) - 1; i >= 0; i--) {
-      //console.log('add data')
-      s.marketData.close.push(s.lookback[i].close)
-    }
-  }
-  var periods_necessary = slow_period + signal_period - 1
-  //dont calculate until we have enough data
-  if (s.marketData.close.length >= periods_necessary) {
-    //fillup marketData for talib.
-    var tmpMarket = JSON.parse(JSON.stringify(s.marketData.close))
-    //add current period
-    tmpMarket.push(s.period.close)
+module.exports = function macd (s, slow_period, fast_period, signal_period) {
+  return new Promise(function(resolve, reject) {
+    // check parameters
+    // if (fast_period > slow_period) {
+    //   console.log('incorrect parameters MACD. (fast_period < slow_period || signal_period > fast_period)')
+    //   return;
+    // }
 
-    talib.execute({
-      name: 'MACD',
-      startIdx: 0,
-      endIdx: tmpMarket.length -1,
-      inReal: tmpMarket,
-      optInFastPeriod: fast_period,
-      optInSlowPeriod: slow_period,
-      optInSignalPeriod: signal_period
-    }, function (err, result) {
-      if (err) {
-        console.log(err)
-        return
+    //create object for talib. only close is used for now but rest might come in handy
+    if (!s.marketData) {
+      s.marketData = { open: [], close: [], high: [], low: [], volume: [] }
+    }
+    if (s.lookback.length > s.marketData.close.length) {
+      for (var i = (s.lookback.length - s.marketData.close.length) - 1; i >= 0; i--) {
+        s.marketData.close.push(s.lookback[i].close)
       }
-      //Result format: (note: outReal  can have multiple items in the array)
-      // {
-      //   begIndex: 8,
-      //   nbElement: 1,
-      //   result: { outReal: [ 1820.8621111111108 ] }
-      // }
-      // console.log(JSON.stringify(marketData))
-      // console.log(JSON.stringify(result.result))
-      s.period[macd_key] = result.result.outMACD[(result.nbElement - 1)]
-      s.period[hist_key] = result.result.outMACDHist[(result.nbElement - 1)]
-      s.period[sig_key] = result.result.outMACDSignal[(result.nbElement - 1)]
-    })
+    }
 
-  }
-}
+    let periods_necessary = slow_period + signal_period - 1
+    //dont calculate until we have enough data
 
+    if (s.marketData.close.length >= periods_necessary) {
+      // fillup marketData for talib.
+      let tmpMarket = s.marketData.close.slice()
+
+      // add current period
+      tmpMarket.push(s.period.close)
+
+      talib.execute({
+        name: 'MACD',
+        startIdx: 0,
+        endIdx: tmpMarket.length - 1,
+        inReal: tmpMarket,
+        optInFastPeriod: fast_period,
+        optInSlowPeriod: slow_period,
+        optInSignalPeriod: signal_period
+      }, function (err, result) {
+        if (err) {
+          reject(err)
+          console.log(err)
+          return
+        }
+        //Result format: (note: outReal  can have multiple items in the array)
+        // {
+        //   begIndex: 8,
+        //   nbElement: 1,
+        //   result: { outReal: [ 1820.8621111111108 ] }
+        // }
+        resolve({
+          'macd': result.result.outMACD[(result.nbElement - 1)],
+          'macd_histogram': result.result.outMACDHist[(result.nbElement - 1)],
+          'macd_signal': result.result.outMACDSignal[(result.nbElement - 1)],
+        })
+      })
+    } else {
+      resolve()
+    }
+  })
+}
diff --git a/lib/ta_macd_ext.js b/lib/ta_macd_ext.js
index 9b9721afa1..cc1a3c30d7 100644
--- a/lib/ta_macd_ext.js
+++ b/lib/ta_macd_ext.js
@@ -18,7 +18,8 @@ module.exports = function ta_macd_ext (s, slow_period, fast_period, signal_perio
 
     if (s.marketData.close.length >= periods_necessary) {
       //fillup marketData for talib.
-      var tmpMarket = JSON.parse(JSON.stringify(s.marketData.close))
+      var tmpMarket = s.marketData.close.slice()
+
       //add current period
       tmpMarket.push(s.period.close)
 
diff --git a/lib/ta_ppo.js b/lib/ta_ppo.js
index 5ae6610858..0d1804cb93 100644
--- a/lib/ta_ppo.js
+++ b/lib/ta_ppo.js
@@ -21,7 +21,7 @@ module.exports = function ppo(s, slow_period, fast_period, signal_period, ma_typ
       return
     }
 
-    let tmpMarket = JSON.parse(JSON.stringify(s.marketData.close))
+    let tmpMarket = s.marketData.close.slice()
 
     // add current period
     tmpMarket.push(s.period.close)
diff --git a/lib/ta_trix.js b/lib/ta_trix.js
index edf45eb1f1..e79ab5315d 100644
--- a/lib/ta_trix.js
+++ b/lib/ta_trix.js
@@ -18,7 +18,7 @@ module.exports = function trix(s, timeperiod) {
       return
     }
 
-    let tmpMarket = JSON.parse(JSON.stringify(s.marketData.close))
+    let tmpMarket = s.marketData.close.slice()
 
     // add current period
     tmpMarket.push(s.period.close)
diff --git a/lib/ta_ultosc.js b/lib/ta_ultosc.js
index d85f7c32bb..afbf1b8ac3 100644
--- a/lib/ta_ultosc.js
+++ b/lib/ta_ultosc.js
@@ -20,13 +20,13 @@ module.exports = function ultosc(s, min_periods, timeperiod1, timeperiod2, timep
       return
     }
 
-    let tmpHigh = JSON.parse(JSON.stringify(s.marketData.high))
+    let tmpHigh = s.marketData.high.slice()
     tmpHigh.push(s.period.high)
 
-    let tmpLow = JSON.parse(JSON.stringify(s.marketData.low))
+    let tmpLow = s.marketData.low.slice()
     tmpLow.push(s.period.low)
 
-    let tmpClose = JSON.parse(JSON.stringify(s.marketData.close))
+    let tmpClose = s.marketData.close.slice()
     tmpClose.push(s.period.close)
 
     talib.execute({