diff --git a/bbgo/trader.go b/bbgo/trader.go
index 480b5268a..f5ba5e786 100644
--- a/bbgo/trader.go
+++ b/bbgo/trader.go
@@ -18,7 +18,7 @@ import (
 var USD = accounting.Accounting{Symbol: "$ ", Precision: 2}
 var BTC = accounting.Accounting{Symbol: "BTC ", Precision: 8}
 
-type SlackReporter struct {
+type SlackNotifier struct {
 	Slack *slack.Client
 
 	TradingChannel string
@@ -26,7 +26,7 @@ type SlackReporter struct {
 	InfoChannel    string
 }
 
-func (t *SlackReporter) Infof(format string, args ...interface{}) {
+func (t *SlackNotifier) Infof(format string, args ...interface{}) {
 	var slackAttachments []slack.Attachment = nil
 	var slackArgsStartIdx = -1
 	for idx, arg := range args {
@@ -63,7 +63,7 @@ func (t *SlackReporter) Infof(format string, args ...interface{}) {
 	}
 }
 
-func (t *SlackReporter) Errorf(err error, format string, args ...interface{}) {
+func (t *SlackNotifier) Errorf(err error, format string, args ...interface{}) {
 	log.WithError(err).Errorf(format, args...)
 	_, _, err2 := t.Slack.PostMessageContext(context.Background(), t.ErrorChannel,
 		slack.MsgOptionText("ERROR: "+err.Error()+" "+fmt.Sprintf(format, args...), true))
@@ -72,7 +72,7 @@ func (t *SlackReporter) Errorf(err error, format string, args ...interface{}) {
 	}
 }
 
-func (t *SlackReporter) ReportTrade(trade *types.Trade) {
+func (t *SlackNotifier) ReportTrade(trade *types.Trade) {
 	_, _, err := t.Slack.PostMessageContext(context.Background(), t.TradingChannel,
 		slack.MsgOptionText(util.Render(`:handshake: trade execution @ {{ .Price  }}`, trade), true),
 		slack.MsgOptionAttachments(trade.SlackAttachment()))
@@ -82,7 +82,7 @@ func (t *SlackReporter) ReportTrade(trade *types.Trade) {
 	}
 }
 
-func (t *SlackReporter) ReportPnL(report *ProfitAndLossReport) {
+func (t *SlackNotifier) ReportPnL(report *ProfitAndLossReport) {
 	attachment := report.SlackAttachment()
 
 	_, _, err := t.Slack.PostMessageContext(context.Background(), t.TradingChannel,
@@ -101,6 +101,8 @@ func (t *SlackReporter) ReportPnL(report *ProfitAndLossReport) {
 
 
 type Trader struct {
+	notifier *SlackNotifier
+
 	// Context is trading Context
 	Context *TradingContext
 
@@ -114,40 +116,7 @@ type Trader struct {
 }
 
 func (t *Trader) Infof(format string, args ...interface{}) {
-	var slackAttachments []slack.Attachment = nil
-	var slackArgsStartIdx = -1
-	for idx, arg := range args {
-		switch a := arg.(type) {
-
-		// concrete type assert first
-		case slack.Attachment:
-			if slackArgsStartIdx == -1 {
-				slackArgsStartIdx = idx
-			}
-			slackAttachments = append(slackAttachments, a)
-
-		case slackstyle.SlackAttachmentCreator:
-			if slackArgsStartIdx == -1 {
-				slackArgsStartIdx = idx
-			}
-			slackAttachments = append(slackAttachments, a.SlackAttachment())
-
-		}
-	}
-
-	var nonSlackArgs = []interface{}{}
-	if slackArgsStartIdx > 0 {
-		nonSlackArgs = args[:slackArgsStartIdx]
-	}
-
-	log.Infof(format, nonSlackArgs...)
-
-	_, _, err := t.Slack.PostMessageContext(context.Background(), t.InfoChannel,
-		slack.MsgOptionText(fmt.Sprintf(format, nonSlackArgs...), true),
-		slack.MsgOptionAttachments(slackAttachments...))
-	if err != nil {
-		log.WithError(err).Errorf("slack error: %s", err.Error())
-	}
+	t.notifier.Infof(format, args...)
 }
 
 func (t *Trader) Errorf(err error, format string, args ...interface{}) {