diff --git a/pkg/bbgo/environment.go b/pkg/bbgo/environment.go
index efdb69d45..bee0c2e92 100644
--- a/pkg/bbgo/environment.go
+++ b/pkg/bbgo/environment.go
@@ -134,6 +134,10 @@ func (environ *Environment) Init(ctx context.Context) (err error) {
 		session.Account.UpdateBalances(balances)
 		session.Account.BindStream(session.Stream)
 
+		session.Stream.OnBalanceUpdate(func(balances types.BalanceMap) {
+			log.Infof("balance update: %+v", balances)
+		})
+
 		// update last prices
 		session.Stream.OnKLineClosed(func(kline types.KLine) {
 			log.Infof("kline closed: %+v", kline)
diff --git a/pkg/exchange/max/maxapi/userdata.go b/pkg/exchange/max/maxapi/userdata.go
index f6600c1db..95bcc916e 100644
--- a/pkg/exchange/max/maxapi/userdata.go
+++ b/pkg/exchange/max/maxapi/userdata.go
@@ -1,6 +1,8 @@
 package max
 
 import (
+	"strings"
+
 	"github.com/pkg/errors"
 	"github.com/valyala/fastjson"
 
@@ -183,7 +185,7 @@ func (m *BalanceMessage) Balance() (*types.Balance, error) {
 	}
 
 	return &types.Balance{
-		Currency:  m.Currency,
+		Currency:  strings.ToUpper(m.Currency),
 		Locked:    locked,
 		Available: available,
 	}, nil