diff --git a/pkg/cmd/orderbook.go b/pkg/cmd/orderbook.go
index b340686d5..2cf6a9c60 100644
--- a/pkg/cmd/orderbook.go
+++ b/pkg/cmd/orderbook.go
@@ -5,13 +5,14 @@ import (
 	"fmt"
 	"syscall"
 
+	log "github.com/sirupsen/logrus"
 	"github.com/spf13/cobra"
 
 	"github.com/c9s/bbgo/pkg/cmd/cmdutil"
 	"github.com/c9s/bbgo/pkg/types"
 )
 
-// go run ./cmd/bbgo orderbook --session=ftx --symbol=btc/usdt
+// go run ./cmd/bbgo orderbook --session=ftx --symbol=BTC/USDT
 var orderbookCmd = &cobra.Command{
 	Use: "orderbook",
 	RunE: func(cmd *cobra.Command, args []string) error {
@@ -29,13 +30,19 @@ var orderbookCmd = &cobra.Command{
 		if err != nil {
 			return fmt.Errorf("can't get the symbol from flags: %w", err)
 		}
+		if symbol == "" {
+			return fmt.Errorf("symbol is not found")
+		}
 
 		s := ex.NewStream()
 		s.Subscribe(types.BookChannel, symbol, types.SubscribeOptions{})
+		s.OnBookSnapshot(func(book types.OrderBook) {
+			log.Infof("orderbook snapshot: %+v", book)
+		})
+
 		if err := s.Connect(ctx); err != nil {
 			return fmt.Errorf("failed to connect to %s", session)
 		}
-		// TODO: register callbacks to print orderbook and updates
 
 		cmdutil.WaitForSignal(ctx, syscall.SIGINT, syscall.SIGTERM)
 		return nil
diff --git a/pkg/exchange/ftx/orderbook_snapshot.json b/pkg/exchange/ftx/orderbook_snapshot.json
new file mode 100644
index 000000000..ca912fa49
--- /dev/null
+++ b/pkg/exchange/ftx/orderbook_snapshot.json
@@ -0,0 +1,814 @@
+{
+  "channel": "orderbook",
+  "market": "BTC/USDT",
+  "type": "partial",
+  "data": {
+    "time": 1614520368.9313016,
+    "checksum": 2150525410,
+    "bids": [
+      [
+        44555.0,
+        3.3968
+      ],
+      [
+        44554.0,
+        0.0561
+      ],
+      [
+        44548.0,
+        0.1683
+      ],
+      [
+        44542.0,
+        0.1762
+      ],
+      [
+        44540.0,
+        0.0433
+      ],
+      [
+        44539.0,
+        4.1616
+      ],
+      [
+        44534.0,
+        0.0234
+      ],
+      [
+        44533.0,
+        33.1201
+      ],
+      [
+        44532.0,
+        8.2272
+      ],
+      [
+        44531.0,
+        0.3364
+      ],
+      [
+        44530.0,
+        0.0011
+      ],
+      [
+        44527.0,
+        0.0074
+      ],
+      [
+        44526.0,
+        0.0117
+      ],
+      [
+        44525.0,
+        0.4514
+      ],
+      [
+        44520.0,
+        0.001
+      ],
+      [
+        44518.0,
+        0.1054
+      ],
+      [
+        44517.0,
+        0.0077
+      ],
+      [
+        44512.0,
+        0.8512
+      ],
+      [
+        44511.0,
+        31.8569
+      ],
+      [
+        44510.0,
+        0.001
+      ],
+      [
+        44507.0,
+        0.0234
+      ],
+      [
+        44506.0,
+        0.382
+      ],
+      [
+        44505.0,
+        0.0468
+      ],
+      [
+        44501.0,
+        0.0082
+      ],
+      [
+        44500.0,
+        0.501
+      ],
+      [
+        44498.0,
+        0.001
+      ],
+      [
+        44496.0,
+        0.0269
+      ],
+      [
+        44490.0,
+        0.001
+      ],
+      [
+        44480.0,
+        0.001
+      ],
+      [
+        44479.0,
+        0.0306
+      ],
+      [
+        44478.0,
+        0.01
+      ],
+      [
+        44477.0,
+        0.302
+      ],
+      [
+        44470.0,
+        0.001
+      ],
+      [
+        44469.0,
+        0.0001
+      ],
+      [
+        44460.0,
+        0.001
+      ],
+      [
+        44454.0,
+        0.001
+      ],
+      [
+        44450.0,
+        0.0019
+      ],
+      [
+        44448.0,
+        0.0005
+      ],
+      [
+        44440.0,
+        0.001
+      ],
+      [
+        44439.0,
+        28.9321
+      ],
+      [
+        44430.0,
+        0.001
+      ],
+      [
+        44420.0,
+        0.001
+      ],
+      [
+        44416.0,
+        0.0001
+      ],
+      [
+        44411.0,
+        0.0984
+      ],
+      [
+        44410.0,
+        0.001
+      ],
+      [
+        44409.0,
+        0.001
+      ],
+      [
+        44408.0,
+        0.0004
+      ],
+      [
+        44407.0,
+        0.0002
+      ],
+      [
+        44400.0,
+        0.001
+      ],
+      [
+        44397.0,
+        0.0002
+      ],
+      [
+        44391.0,
+        0.0004
+      ],
+      [
+        44390.0,
+        0.001
+      ],
+      [
+        44389.0,
+        43.3904
+      ],
+      [
+        44380.0,
+        0.001
+      ],
+      [
+        44376.0,
+        0.0001
+      ],
+      [
+        44375.0,
+        0.0001
+      ],
+      [
+        44372.0,
+        0.0002
+      ],
+      [
+        44370.0,
+        0.0012
+      ],
+      [
+        44365.0,
+        0.001
+      ],
+      [
+        44363.0,
+        0.0004
+      ],
+      [
+        44360.0,
+        0.001
+      ],
+      [
+        44354.0,
+        54.0385
+      ],
+      [
+        44350.0,
+        0.0028
+      ],
+      [
+        44346.0,
+        0.0001
+      ],
+      [
+        44340.0,
+        0.0013
+      ],
+      [
+        44338.0,
+        0.0002
+      ],
+      [
+        44336.0,
+        39.6518
+      ],
+      [
+        44333.0,
+        0.0001
+      ],
+      [
+        44330.0,
+        0.001
+      ],
+      [
+        44329.0,
+        0.5014
+      ],
+      [
+        44326.0,
+        0.0002
+      ],
+      [
+        44322.0,
+        0.001
+      ],
+      [
+        44321.0,
+        0.001
+      ],
+      [
+        44320.0,
+        0.001
+      ],
+      [
+        44314.0,
+        0.0007
+      ],
+      [
+        44310.0,
+        0.001
+      ],
+      [
+        44306.0,
+        0.0001
+      ],
+      [
+        44300.0,
+        33.2836
+      ],
+      [
+        44292.0,
+        0.0035
+      ],
+      [
+        44291.0,
+        0.0004
+      ],
+      [
+        44290.0,
+        0.001
+      ],
+      [
+        44287.0,
+        39.717
+      ],
+      [
+        44285.0,
+        0.0439
+      ],
+      [
+        44281.0,
+        1.0294
+      ],
+      [
+        44280.0,
+        0.001
+      ],
+      [
+        44277.0,
+        0.001
+      ],
+      [
+        44275.0,
+        0.0165
+      ],
+      [
+        44270.0,
+        0.001
+      ],
+      [
+        44268.0,
+        48.31
+      ],
+      [
+        44260.0,
+        0.0011
+      ],
+      [
+        44254.0,
+        0.0003
+      ],
+      [
+        44250.0,
+        0.0031
+      ],
+      [
+        44246.0,
+        0.0002
+      ],
+      [
+        44244.0,
+        0.0001
+      ],
+      [
+        44241.0,
+        0.0009
+      ],
+      [
+        44240.0,
+        0.001
+      ],
+      [
+        44233.0,
+        0.001
+      ],
+      [
+        44230.0,
+        0.001
+      ],
+      [
+        44224.0,
+        0.0001
+      ],
+      [
+        44222.0,
+        0.0002
+      ]
+    ],
+    "asks": [
+      [
+        44574.0,
+        0.4591
+      ],
+      [
+        44579.0,
+        0.15
+      ],
+      [
+        44582.0,
+        2.9122
+      ],
+      [
+        44583.0,
+        0.1683
+      ],
+      [
+        44584.0,
+        0.5
+      ],
+      [
+        44588.0,
+        0.0433
+      ],
+      [
+        44590.0,
+        8.6379
+      ],
+      [
+        44593.0,
+        0.405
+      ],
+      [
+        44595.0,
+        0.5988
+      ],
+      [
+        44596.0,
+        0.06
+      ],
+      [
+        44605.0,
+        0.6927
+      ],
+      [
+        44606.0,
+        0.3365
+      ],
+      [
+        44616.0,
+        0.1752
+      ],
+      [
+        44617.0,
+        0.0215
+      ],
+      [
+        44620.0,
+        0.008
+      ],
+      [
+        44629.0,
+        0.0078
+      ],
+      [
+        44630.0,
+        0.101
+      ],
+      [
+        44631.0,
+        0.246
+      ],
+      [
+        44632.0,
+        0.01
+      ],
+      [
+        44635.0,
+        0.2997
+      ],
+      [
+        44636.0,
+        26.777
+      ],
+      [
+        44639.0,
+        0.662
+      ],
+      [
+        44642.0,
+        0.0078
+      ],
+      [
+        44650.0,
+        0.0009
+      ],
+      [
+        44651.0,
+        0.0001
+      ],
+      [
+        44652.0,
+        0.0079
+      ],
+      [
+        44653.0,
+        0.0003
+      ],
+      [
+        44654.0,
+        0.354
+      ],
+      [
+        44661.0,
+        0.0306
+      ],
+      [
+        44666.0,
+        0.0002
+      ],
+      [
+        44667.0,
+        0.0009
+      ],
+      [
+        44668.0,
+        0.0234
+      ],
+      [
+        44672.0,
+        25.923
+      ],
+      [
+        44673.0,
+        0.1
+      ],
+      [
+        44674.0,
+        0.001
+      ],
+      [
+        44675.0,
+        0.0467
+      ],
+      [
+        44678.0,
+        0.1286
+      ],
+      [
+        44680.0,
+        0.0467
+      ],
+      [
+        44684.0,
+        0.0117
+      ],
+      [
+        44687.0,
+        0.0351
+      ],
+      [
+        44689.0,
+        0.1052
+      ],
+      [
+        44693.0,
+        0.0132
+      ],
+      [
+        44699.0,
+        0.0984
+      ],
+      [
+        44700.0,
+        0.671
+      ],
+      [
+        44709.0,
+        0.0007
+      ],
+      [
+        44713.0,
+        45.9031
+      ],
+      [
+        44714.0,
+        0.0001
+      ],
+      [
+        44719.0,
+        0.001
+      ],
+      [
+        44727.0,
+        0.0004
+      ],
+      [
+        44728.0,
+        0.0002
+      ],
+      [
+        44735.0,
+        0.0003
+      ],
+      [
+        44744.0,
+        64.7511
+      ],
+      [
+        44750.0,
+        0.0018
+      ],
+      [
+        44763.0,
+        0.001
+      ],
+      [
+        44775.0,
+        0.0006
+      ],
+      [
+        44781.0,
+        0.0001
+      ],
+      [
+        44782.0,
+        34.2206
+      ],
+      [
+        44784.0,
+        0.0001
+      ],
+      [
+        44790.0,
+        0.0002
+      ],
+      [
+        44796.0,
+        0.001
+      ],
+      [
+        44799.0,
+        0.0002
+      ],
+      [
+        44800.0,
+        0.0011
+      ],
+      [
+        44806.0,
+        0.0165
+      ],
+      [
+        44807.0,
+        0.001
+      ],
+      [
+        44813.0,
+        0.0001
+      ],
+      [
+        44814.0,
+        0.0003
+      ],
+      [
+        44816.0,
+        0.0002
+      ],
+      [
+        44820.0,
+        38.3495
+      ],
+      [
+        44822.0,
+        0.0026
+      ],
+      [
+        44836.0,
+        0.0001
+      ],
+      [
+        44846.0,
+        50.1127
+      ],
+      [
+        44850.0,
+        0.0018
+      ],
+      [
+        44851.0,
+        0.001
+      ],
+      [
+        44859.0,
+        0.0003
+      ],
+      [
+        44867.0,
+        66.5987
+      ],
+      [
+        44876.0,
+        1.0294
+      ],
+      [
+        44885.0,
+        0.0005
+      ],
+      [
+        44888.0,
+        0.0002
+      ],
+      [
+        44889.0,
+        0.0003
+      ],
+      [
+        44895.0,
+        0.001
+      ],
+      [
+        44897.0,
+        0.0443
+      ],
+      [
+        44900.0,
+        40.9965
+      ],
+      [
+        44909.0,
+        0.0008
+      ],
+      [
+        44913.0,
+        0.0001
+      ],
+      [
+        44926.0,
+        45.4838
+      ],
+      [
+        44928.0,
+        70.5138
+      ],
+      [
+        44938.0,
+        0.0005
+      ],
+      [
+        44939.0,
+        0.001
+      ],
+      [
+        44949.0,
+        0.0004
+      ],
+      [
+        44950.0,
+        0.0019
+      ],
+      [
+        44959.0,
+        0.0002
+      ],
+      [
+        44962.0,
+        0.0002
+      ],
+      [
+        44979.0,
+        0.0002
+      ],
+      [
+        44982.0,
+        68.1033
+      ],
+      [
+        44983.0,
+        0.001
+      ],
+      [
+        44999.0,
+        0.0003
+      ],
+      [
+        45000.0,
+        0.0273
+      ],
+      [
+        45002.0,
+        0.0002
+      ],
+      [
+        45009.0,
+        0.0003
+      ],
+      [
+        45010.0,
+        0.0003
+      ]
+    ],
+    "action": "partial"
+  }
+}
diff --git a/pkg/exchange/ftx/stream.go b/pkg/exchange/ftx/stream.go
index fad2036e7..6f16be55a 100644
--- a/pkg/exchange/ftx/stream.go
+++ b/pkg/exchange/ftx/stream.go
@@ -8,7 +8,7 @@ import (
 )
 
 type Stream struct {
-	types.StandardStream
+	*types.StandardStream
 
 	wsService *WebsocketService
 
@@ -19,11 +19,11 @@ type Stream struct {
 func NewStream(key, secret string) *Stream {
 	wss := NewWebsocketService(key, secret)
 	s := &Stream{
-		StandardStream: types.StandardStream{},
+		StandardStream: &types.StandardStream{},
 		wsService:      wss,
 	}
 
-	wss.OnMessage(messageHandler{s.StandardStream}.handleMessage)
+	wss.OnMessage(messageHandler{StandardStream: s.StandardStream}.handleMessage)
 	return s
 }
 
diff --git a/pkg/exchange/ftx/stream_message_handler.go b/pkg/exchange/ftx/stream_message_handler.go
index 9c89f4958..76e8c58be 100644
--- a/pkg/exchange/ftx/stream_message_handler.go
+++ b/pkg/exchange/ftx/stream_message_handler.go
@@ -3,11 +3,13 @@ package ftx
 import (
 	"encoding/json"
 
+	log "github.com/sirupsen/logrus"
+
 	"github.com/c9s/bbgo/pkg/types"
 )
 
 type messageHandler struct {
-	types.StandardStream
+	*types.StandardStream
 }
 
 func (h messageHandler) handleMessage(message []byte) {
@@ -20,6 +22,11 @@ func (h messageHandler) handleMessage(message []byte) {
 	switch r.Type {
 	case subscribedRespType:
 		h.handleSubscribedMessage(r)
+	case partialRespType:
+		// snapshot of current market data
+		h.handleSnapshot(r)
+	case updateRespType:
+		//log.Infof("update=> %s", string(message))
 	default:
 		logger.Errorf("unsupported message type: %+v", r.Type)
 	}
@@ -27,5 +34,15 @@ func (h messageHandler) handleMessage(message []byte) {
 
 // {"type": "subscribed", "channel": "orderbook", "market": "BTC/USDT"}
 func (h messageHandler) handleSubscribedMessage(response rawResponse) {
-	logger.Infof("%s orderbook is subscribed", response.toSubscribedResp().Market)
+	r := response.toSubscribedResp()
+	logger.Infof("%s %s is subscribed", r.Market, r.Channel)
+}
+
+func (h messageHandler) handleSnapshot(response rawResponse) {
+	r, err := response.toSnapshotResp()
+	if err != nil {
+		log.WithError(err).Errorf("failed to convert the partial response to snapshot")
+		return
+	}
+	h.EmitBookSnapshot(r.toGlobalOrderBook())
 }
diff --git a/pkg/exchange/ftx/websocket_messages.go b/pkg/exchange/ftx/websocket_messages.go
index 94ce0aee9..34d7b506a 100644
--- a/pkg/exchange/ftx/websocket_messages.go
+++ b/pkg/exchange/ftx/websocket_messages.go
@@ -1,6 +1,15 @@
 package ftx
 
-import "encoding/json"
+import (
+	"encoding/json"
+	"fmt"
+	"math"
+	"strings"
+	"time"
+
+	"github.com/c9s/bbgo/pkg/fixedpoint"
+	"github.com/c9s/bbgo/pkg/types"
+)
 
 type operation string
 
@@ -56,7 +65,74 @@ func (r rawResponse) toSubscribedResp() subscribedResponse {
 	}
 }
 
+func (r rawResponse) toSnapshotResp() (snapshotResponse, error) {
+	o := snapshotResponse{
+		mandatoryFields: r.mandatoryFields,
+	}
+
+	if err := json.Unmarshal(r.Data["action"], &o.Action); err != nil {
+		return snapshotResponse{}, fmt.Errorf("failed to unmarshal data.action field: %w", err)
+	}
+
+	var t float64
+	if err := json.Unmarshal(r.Data["time"], &t); err != nil {
+		return snapshotResponse{}, fmt.Errorf("failed to unmarshal data.time field: %w", err)
+	}
+	sec, dec := math.Modf(t)
+	o.Time = time.Unix(int64(sec), int64(dec*1e9))
+
+	if err := json.Unmarshal(r.Data["checksum"], &o.Checksum); err != nil {
+		return snapshotResponse{}, fmt.Errorf("failed to unmarshal data.checksum field: %w", err)
+	}
+
+	if err := json.Unmarshal(r.Data["bids"], &o.Bids); err != nil {
+		return snapshotResponse{}, fmt.Errorf("failed to unmarshal data.bids field: %w", err)
+	}
+
+	if err := json.Unmarshal(r.Data["asks"], &o.Asks); err != nil {
+		return snapshotResponse{}, fmt.Errorf("failed to unmarshal data.asks field: %w", err)
+	}
+
+	return o, nil
+}
+
 // {"type": "subscribed", "channel": "orderbook", "market": "BTC/USDT"}
 type subscribedResponse struct {
 	mandatoryFields
 }
+
+type snapshotResponse struct {
+	mandatoryFields
+
+	Action string
+
+	Time time.Time
+
+	Checksum int64
+
+	// Best 100 orders
+	Bids [][]float64
+
+	// Best 100 orders
+	Asks [][]float64
+}
+
+func (r snapshotResponse) toGlobalOrderBook() types.OrderBook {
+	return types.OrderBook{
+		// ex. BTC/USDT
+		Symbol: strings.ToUpper(r.Market),
+		Bids:   toPriceVolumeSlice(r.Bids),
+		Asks:   toPriceVolumeSlice(r.Asks),
+	}
+}
+
+func toPriceVolumeSlice(orders [][]float64) types.PriceVolumeSlice {
+	var pv types.PriceVolumeSlice
+	for _, o := range orders {
+		pv = append(pv, types.PriceVolume{
+			Price:  fixedpoint.NewFromFloat(o[0]),
+			Volume: fixedpoint.NewFromFloat(o[1]),
+		})
+	}
+	return pv
+}
diff --git a/pkg/exchange/ftx/websocket_messages_test.go b/pkg/exchange/ftx/websocket_messages_test.go
index 33456069d..ab685f1fe 100644
--- a/pkg/exchange/ftx/websocket_messages_test.go
+++ b/pkg/exchange/ftx/websocket_messages_test.go
@@ -2,9 +2,13 @@ package ftx
 
 import (
 	"encoding/json"
+	"io/ioutil"
 	"testing"
 
 	"github.com/stretchr/testify/assert"
+
+	"github.com/c9s/bbgo/pkg/fixedpoint"
+	"github.com/c9s/bbgo/pkg/types"
 )
 
 func Test_rawResponse_toSubscribedResp(t *testing.T) {
@@ -16,3 +20,59 @@ func Test_rawResponse_toSubscribedResp(t *testing.T) {
 	assert.Equal(t, orderbook, r.Channel)
 	assert.Equal(t, "BTC/USDT", r.Market)
 }
+
+func Test_rawResponse_toSnapshotResp(t *testing.T) {
+	f, err := ioutil.ReadFile("./orderbook_snapshot.json")
+	assert.NoError(t, err)
+	var m rawResponse
+	assert.NoError(t, json.Unmarshal(f, &m))
+	r, err := m.toSnapshotResp()
+	assert.NoError(t, err)
+	assert.Equal(t, partialRespType, r.Type)
+	assert.Equal(t, orderbook, r.Channel)
+	assert.Equal(t, "BTC/USDT", r.Market)
+	assert.Equal(t, int64(1614520368), r.Time.Unix())
+	assert.Equal(t, int64(2150525410), r.Checksum)
+	assert.Len(t, r.Bids, 100)
+	assert.Equal(t, []float64{44555.0, 3.3968}, r.Bids[0])
+	assert.Equal(t, []float64{44554.0, 0.0561}, r.Bids[1])
+	assert.Len(t, r.Asks, 100)
+	assert.Equal(t, []float64{44574.0, 0.4591}, r.Asks[0])
+	assert.Equal(t, []float64{44579.0, 0.15}, r.Asks[1])
+}
+
+func Test_snapshotResponse_toGlobalOrderBook(t *testing.T) {
+	f, err := ioutil.ReadFile("./orderbook_snapshot.json")
+	assert.NoError(t, err)
+	var m rawResponse
+	assert.NoError(t, json.Unmarshal(f, &m))
+	r, err := m.toSnapshotResp()
+	assert.NoError(t, err)
+
+	b := r.toGlobalOrderBook()
+	assert.NoError(t, err)
+	assert.Equal(t, "BTC/USDT", b.Symbol)
+	isValid, err := b.IsValid()
+	assert.True(t, isValid)
+	assert.NoError(t, err)
+
+	assert.Len(t, b.Bids, 100)
+	assert.Equal(t, types.PriceVolume{
+		Price:  fixedpoint.MustNewFromString("44555.0"),
+		Volume: fixedpoint.MustNewFromString("3.3968"),
+	}, b.Bids[0])
+	assert.Equal(t, types.PriceVolume{
+		Price:  fixedpoint.MustNewFromString("44222.0"),
+		Volume: fixedpoint.MustNewFromString("0.0002"),
+	}, b.Bids[99])
+
+	assert.Len(t, b.Asks, 100)
+	assert.Equal(t, types.PriceVolume{
+		Price:  fixedpoint.MustNewFromString("44574.0"),
+		Volume: fixedpoint.MustNewFromString("0.4591"),
+	}, b.Asks[0])
+	assert.Equal(t, types.PriceVolume{
+		Price:  fixedpoint.MustNewFromString("45010.0"),
+		Volume: fixedpoint.MustNewFromString("0.0003"),
+	}, b.Asks[99])
+}