diff --git a/pkg/bbgo/session.go b/pkg/bbgo/session.go
index 16518a0..3e4935d 100644
--- a/pkg/bbgo/session.go
+++ b/pkg/bbgo/session.go
@@ -43,6 +43,7 @@ type ExchangeSession struct {
 	Secret       string             `json:"secret,omitempty" yaml:"secret,omitempty"`
 	Passphrase   string             `json:"passphrase,omitempty" yaml:"passphrase,omitempty"`
 	Proxy        string             `json:"proxy,omitempty" yaml:"proxy,omitempty"`
+	Simulated    string             `json:"simulated,omitempty" yaml:"simulated,omitempty"`
 	SubAccount   string             `json:"subAccount,omitempty" yaml:"subAccount,omitempty"`
 
 	// Withdrawal is used for enabling withdrawal functions
@@ -796,7 +797,7 @@ func (session *ExchangeSession) newBasicPrivateExchange(exchangeName types.Excha
 	var err error
 	var exMinimal types.ExchangeMinimal
 	if session.Key != "" && session.Secret != "" {
-		exMinimal, err = exchange2.New(exchangeName, session.Key, session.Secret, session.Passphrase, session.Proxy)
+		exMinimal, err = exchange2.New(exchangeName, session.Key, session.Secret, session.Passphrase, session.Proxy, session.Simulated)
 	} else {
 		exMinimal, err = exchange2.NewWithEnvVarPrefix(exchangeName, session.EnvVarPrefix)
 	}
diff --git a/pkg/exchange/factory.go b/pkg/exchange/factory.go
index 6332166..9816a6d 100644
--- a/pkg/exchange/factory.go
+++ b/pkg/exchange/factory.go
@@ -15,7 +15,7 @@ import (
 )
 
 func NewPublic(exchangeName types.ExchangeName) (types.Exchange, error) {
-	exMinimal, err := New(exchangeName, "", "", "", "")
+	exMinimal, err := New(exchangeName, "", "", "", "", "0")
 	if err != nil {
 		return nil, err
 	}
@@ -27,7 +27,7 @@ func NewPublic(exchangeName types.ExchangeName) (types.Exchange, error) {
 	return nil, fmt.Errorf("exchange %T does not implement types.Exchange", exMinimal)
 }
 
-func New(n types.ExchangeName, key, secret, passphrase, proxy string) (types.ExchangeMinimal, error) {
+func New(n types.ExchangeName, key, secret, passphrase, proxy, simulated string) (types.ExchangeMinimal, error) {
 	switch n {
 
 	case types.ExchangeBinance:
@@ -37,7 +37,7 @@ func New(n types.ExchangeName, key, secret, passphrase, proxy string) (types.Exc
 		return max.New(key, secret), nil
 
 	case types.ExchangeOKEx:
-		return okex.New(key, secret, passphrase), nil
+		return okex.New(key, secret, passphrase, simulated), nil
 
 	case types.ExchangeKucoin:
 		return kucoin.New(key, secret, passphrase), nil
@@ -71,5 +71,6 @@ func NewWithEnvVarPrefix(n types.ExchangeName, varPrefix string) (types.Exchange
 
 	passphrase := os.Getenv(varPrefix + "_API_PASSPHRASE")
 	proxy := os.Getenv(varPrefix + "_PROXY")
-	return New(n, key, secret, passphrase, proxy)
+	simulated := os.Getenv(varPrefix + "_SIMULATED")
+	return New(n, key, secret, passphrase, proxy, simulated)
 }
diff --git a/pkg/exchange/okex/exchange.go b/pkg/exchange/okex/exchange.go
index ad93464..1d1066a 100644
--- a/pkg/exchange/okex/exchange.go
+++ b/pkg/exchange/okex/exchange.go
@@ -65,13 +65,12 @@ var log = logrus.WithFields(logrus.Fields{
 var ErrSymbolRequired = errors.New("symbol is a required parameter")
 
 type Exchange struct {
-	key, secret, passphrase string
-
-	client      *okexapi.RestClient
-	timeNowFunc func() time.Time
+	key, secret, passphrase, simulated string
+	client                             *okexapi.RestClient
+	timeNowFunc                        func() time.Time
 }
 
-func New(key, secret, passphrase string) *Exchange {
+func New(key, secret, passphrase, simulated string) *Exchange {
 	client := okexapi.NewClient()
 
 	if len(key) > 0 && len(secret) > 0 {
@@ -82,6 +81,7 @@ func New(key, secret, passphrase string) *Exchange {
 		key:         key,
 		secret:      secret,
 		passphrase:  passphrase,
+		simulated:   simulated,
 		client:      client,
 		timeNowFunc: time.Now,
 	}
diff --git a/pkg/exchange/okex/okexapi/client.go b/pkg/exchange/okex/okexapi/client.go
index 8a3d96a..54216cf 100644
--- a/pkg/exchange/okex/okexapi/client.go
+++ b/pkg/exchange/okex/okexapi/client.go
@@ -24,6 +24,18 @@ const PublicWebSocketURL = "wss://wsaws.okx.com:8443/ws/v5/public"
 const PrivateWebSocketURL = "wss://wsaws.okx.com:8443/ws/v5/private"
 const PublicBusinessWebSocketURL = "wss://wsaws.okx.com:8443/ws/v5/business"
 
+/*
+模拟交易
+REST：https://www.okx.com
+WebSocket公共频道：wss://wspap.okx.com:8443/ws/v5/public
+WebSocket私有频道：wss://wspap.okx.com:8443/ws/v5/private
+WebSocket业务频道：wss://wspap.okx.com:8443/ws/v5/business
+*/
+const SimulatedRestBaseURL = "https://www.okx.com/"
+const SimulatedPublicWebSocketURL = "wss://wspap.okx.com:8443/ws/v5/public"
+const SimulatedPrivateWebSocketURL = "wss://wspap.okx.com:8443/ws/v5/private"
+const SimulatedPublicBusinessWebSocketURL = "wss://wspap.okx.com:8443/ws/v5/business"
+
 type SideType string
 
 const (
diff --git a/pkg/exchange/okex/query_kline_test.go b/pkg/exchange/okex/query_kline_test.go
index 6b87eeb..523e543 100644
--- a/pkg/exchange/okex/query_kline_test.go
+++ b/pkg/exchange/okex/query_kline_test.go
@@ -16,7 +16,7 @@ func Test_QueryKlines(t *testing.T) {
 		t.Skip("Please configure all credentials about OKEX")
 	}
 
-	e := New(key, secret, passphrase)
+	e := New(key, secret, passphrase, "0")
 
 	queryOrder := types.OrderQuery{
 		Symbol: "BTC-USDT",