FEATURE: [dca2] make the take-profit order of round from order to orders

pkg/strategy/dca2/collector.go

@@ -2,7 +2,6 @@ package dca2
 
 import (
 	"context"
-	"fmt"
 	"strconv"
 	"time"
 
@@ -11,9 +10,15 @@ import (
 	"github.com/sirupsen/logrus"
 )
 
+// Round contains the open-position orders and the take-profit orders
+// 1. len(OpenPositionOrders) == 0 -> not open position
+// 2. len(TakeProfitOrders) == 0   -> not in the take-profit stage
+// 3. There are take-profit orders only when open-position orders are cancelled
+// 4. We need to make sure the order: open-position (BUY) -> take-profit (SELL) -> open-position (BUY) -> take-profit (SELL) -> ...
+// 5. When there is one filled take-profit order, this round must be finished. We need to verify all take-profit orders are not active
 type Round struct {
 	OpenPositionOrders []types.Order
-	TakeProfitOrder    types.Order
+	TakeProfitOrders   []types.Order
 }
 
 type Collector struct {
@@ -106,10 +111,7 @@ func (rc Collector) CollectCurrentRound(ctx context.Context) (Round, error) {
 		case openPositionSide:
 			currentRound.OpenPositionOrders = append(currentRound.OpenPositionOrders, order)
 		case takeProfitSide:
-			if currentRound.TakeProfitOrder.OrderID != 0 {
-				return currentRound, fmt.Errorf("there are two take-profit orders in one round, please check it")
-			}
-			currentRound.TakeProfitOrder = order
+			currentRound.TakeProfitOrders = append(currentRound.TakeProfitOrders, order)
 		default:
 		}
 
@@ -141,12 +143,20 @@ func (rc *Collector) CollectFinishRounds(ctx context.Context, fromOrderID uint64
 		case types.SideTypeBuy:
 			round.OpenPositionOrders = append(round.OpenPositionOrders, order)
 		case types.SideTypeSell:
+			round.TakeProfitOrders = append(round.TakeProfitOrders, order)
+
 			if order.Status != types.OrderStatusFilled {
-				rc.logger.Infof("take-profit order is %s not filled, so this round is not finished. Skip it", order.Status)
+				rc.logger.Infof("take-profit order is %s not filled, so this round is not finished. Keep collecting", order.Status)
 				continue
 			}
 
-			round.TakeProfitOrder = order
+			for _, o := range round.TakeProfitOrders {
+				if types.IsActiveOrder(o) {
+					// Should not happen ! but we only log it
+					rc.logger.Errorf("there is at least one take-profit order (%d) is still active, please check it", o.OrderID)
+				}
+			}
+
 			rounds = append(rounds, round)
 			round = Round{}
 		default:
@@ -164,10 +174,7 @@ func (rc *Collector) CollectRoundTrades(ctx context.Context, round Round) ([]typ
 	var roundTrades []types.Trade
 	var roundOrders []types.Order = round.OpenPositionOrders
 
-	// if the take-profit order's OrderID == 0 -> no take-profit order.
-	if round.TakeProfitOrder.OrderID != 0 {
-		roundOrders = append(roundOrders, round.TakeProfitOrder)
-	}
+	roundOrders = append(roundOrders, round.TakeProfitOrders...)
 
 	for _, order := range roundOrders {
 		if order.ExecutedQuantity.IsZero() {

pkg/strategy/dca2/collector_test.go

@@ -0,0 +1,72 @@
+package dca2
+
+import (
+	"testing"
+
+	"github.com/c9s/bbgo/pkg/types"
+	"github.com/c9s/bbgo/pkg/types/mocks"
+	"github.com/stretchr/testify/assert"
+	"go.uber.org/mock/gomock"
+)
+
+func Test_NewCollector(t *testing.T) {
+	symbol := "ETHUSDT"
+	logger := log.WithField("strategy", ID)
+
+	t.Run("return nil if the exchange doesn't support ExchangeTradeHistoryService", func(t *testing.T) {
+		mockCtrl := gomock.NewController(t)
+		mockEx := mocks.NewMockExchange(mockCtrl)
+		mockEx.EXPECT().Name().Return(types.ExchangeMax)
+
+		collector := NewCollector(logger, symbol, 0, mockEx)
+
+		assert.Nil(t, collector)
+	})
+
+	t.Run("return nil if the exchange doesn't support ExchangeOrderQueryService", func(t *testing.T) {
+		mockCtrl := gomock.NewController(t)
+		mockEx := mocks.NewMockExchange(mockCtrl)
+		mockEx.EXPECT().Name().Return(types.ExchangeMax)
+
+		mockTradeHistoryService := mocks.NewMockExchangeTradeHistoryService(mockCtrl)
+
+		type TestEx struct {
+			types.Exchange
+			types.ExchangeTradeHistoryService
+		}
+
+		ex := TestEx{
+			Exchange:                    mockEx,
+			ExchangeTradeHistoryService: mockTradeHistoryService,
+		}
+
+		collector := NewCollector(logger, symbol, 0, ex)
+
+		assert.Nil(t, collector)
+	})
+
+	t.Run("return nil if the exchange doesn't support descendingClosedOrderQueryService", func(t *testing.T) {
+		mockCtrl := gomock.NewController(t)
+		mockEx := mocks.NewMockExchange(mockCtrl)
+		mockEx.EXPECT().Name().Return(types.ExchangeMax)
+
+		mockTradeHistoryService := mocks.NewMockExchangeTradeHistoryService(mockCtrl)
+		mockOrderQueryService := mocks.NewMockExchangeOrderQueryService(mockCtrl)
+
+		type TestEx struct {
+			types.Exchange
+			types.ExchangeTradeHistoryService
+			types.ExchangeOrderQueryService
+		}
+
+		ex := TestEx{
+			Exchange:                    mockEx,
+			ExchangeTradeHistoryService: mockTradeHistoryService,
+			ExchangeOrderQueryService:   mockOrderQueryService,
+		}
+
+		collector := NewCollector(logger, symbol, 0, ex)
+
+		assert.Nil(t, collector)
+	})
+}

pkg/strategy/dca2/debug.go

@@ -22,7 +22,9 @@ func (s *Strategy) debugOrders(submitOrders []types.Order) {
 func debugRoundOrders(logger *logrus.Entry, roundName string, round Round) {
 	var sb strings.Builder
 	sb.WriteString("ROUND " + roundName + " [\n")
-	sb.WriteString(round.TakeProfitOrder.String() + "\n")
+	for i, order := range round.TakeProfitOrders {
+		sb.WriteString(fmt.Sprintf("%3d) ", i+1) + order.String() + "\n")
+	}
 	sb.WriteString("------------------------------------------------\n")
 	for i, order := range round.OpenPositionOrders {
 		sb.WriteString(fmt.Sprintf("%3d) ", i+1) + order.String() + "\n")

pkg/strategy/dca2/recover.go

@@ -64,63 +64,55 @@ func recoverState(ctx context.Context, maxOrderCount int, currentRound Round, or
 	orderStore := orderExecutor.OrderStore()
 
 	// dca stop at take-profit order stage
-	if currentRound.TakeProfitOrder.OrderID != 0 {
-		// the number of open-positions orders may not be equal to maxOrderCount, because the notional may not enough to open maxOrderCount orders
-		if len(currentRound.OpenPositionOrders) > maxOrderCount {
-			return None, fmt.Errorf("there is take-profit order but the number of open-position orders (%d) is greater than maxOrderCount(%d). Please check it", len(currentRound.OpenPositionOrders), maxOrderCount)
+	if len(currentRound.TakeProfitOrders) > 0 {
+		openedOrders, cancelledOrders, filledOrders, unexpectedOrders := classifyOrders(currentRound.TakeProfitOrders)
+
+		if len(unexpectedOrders) > 0 {
+			return None, fmt.Errorf("there is unexpected status in orders %+v", unexpectedOrders)
 		}
 
-		takeProfitOrder := currentRound.TakeProfitOrder
-		if takeProfitOrder.Status == types.OrderStatusFilled {
+		if len(filledOrders) > 0 && len(openedOrders) == 0 {
 			return WaitToOpenPosition, nil
-		} else if types.IsActiveOrder(takeProfitOrder) {
-			activeOrderBook.Add(takeProfitOrder)
-			orderStore.Add(takeProfitOrder)
+		}
+
+		if len(filledOrders) == 0 && len(openedOrders) > 0 {
+			// add opened order into order store
+			for _, order := range openedOrders {
+				activeOrderBook.Add(order)
+				orderStore.Add(order)
+			}
 			return TakeProfitReady, nil
-		} else {
-			return None, fmt.Errorf("the status of take-profit order is %s. Please check it", takeProfitOrder.Status)
 		}
+
+		return None, fmt.Errorf("the classify orders count is not expected (opened: %d, cancelled: %d, filled: %d)", len(openedOrders), len(cancelledOrders), len(filledOrders))
 	}
 
 	// dca stop at no take-profit order stage
 	openPositionOrders := currentRound.OpenPositionOrders
-	numOpenPositionOrders := len(openPositionOrders)
 
 	// new strategy
 	if len(openPositionOrders) == 0 {
 		return WaitToOpenPosition, nil
 	}
 
-	// should not happen
-	if numOpenPositionOrders > maxOrderCount {
-		return None, fmt.Errorf("the number of open-position orders (%d) is > max order number", numOpenPositionOrders)
-	}
-
 	// collect open-position orders' status
-	var openedCnt, filledCnt, cancelledCnt int64
-	for _, order := range currentRound.OpenPositionOrders {
-		switch order.Status {
-		case types.OrderStatusNew, types.OrderStatusPartiallyFilled:
-			activeOrderBook.Add(order)
-			orderStore.Add(order)
-			openedCnt++
-		case types.OrderStatusFilled:
-			filledCnt++
-		case types.OrderStatusCanceled:
-			cancelledCnt++
-		default:
-			return None, fmt.Errorf("there is unexpected status %s of order %s", order.Status, order)
-		}
+	openedOrders, cancelledOrders, filledOrders, unexpectedOrders := classifyOrders(currentRound.OpenPositionOrders)
+	if len(unexpectedOrders) > 0 {
+		return None, fmt.Errorf("there is unexpected status of orders %+v", unexpectedOrders)
+	}
+	for _, order := range openedOrders {
+		activeOrderBook.Add(order)
+		orderStore.Add(order)
 	}
 
 	// no order is filled -> OpenPositionReady
-	if filledCnt == 0 {
+	if len(filledOrders) == 0 {
 		return OpenPositionReady, nil
 	}
 
 	// there are at least one open-position orders filled
-	if cancelledCnt == 0 {
-		if openedCnt > 0 {
+	if len(cancelledOrders) == 0 {
+		if len(openedOrders) > 0 {
 			return OpenPositionOrderFilled, nil
 		} else {
 			// all open-position orders filled, change to cancelling and place the take-profit order
@@ -141,13 +133,17 @@ func recoverPosition(ctx context.Context, position *types.Position, currentRound
 	position.Reset()
 
 	var positionOrders []types.Order
-	if currentRound.TakeProfitOrder.OrderID != 0 {
-		// if the take-profit order is already filled, the position is 0
-		if !types.IsActiveOrder(currentRound.TakeProfitOrder) {
-			return nil
+
+	var filledCnt int64
+	for _, order := range currentRound.TakeProfitOrders {
+		if !types.IsActiveOrder(order) {
+			filledCnt++
 		}
+		positionOrders = append(positionOrders, order)
+	}
 
-		positionOrders = append(positionOrders, currentRound.TakeProfitOrder)
+	if filledCnt == int64(len(currentRound.TakeProfitOrders)) {
+		return nil
 	}
 
 	for _, order := range currentRound.OpenPositionOrders {
@@ -184,9 +180,30 @@ func recoverProfitStats(ctx context.Context, strategy *Strategy) error {
 }
 
 func recoverStartTimeOfNextRound(ctx context.Context, currentRound Round, coolDownInterval types.Duration) time.Time {
-	if currentRound.TakeProfitOrder.OrderID != 0 && currentRound.TakeProfitOrder.Status == types.OrderStatusFilled {
-		return currentRound.TakeProfitOrder.UpdateTime.Time().Add(coolDownInterval.Duration())
+	var startTimeOfNextRound time.Time
+
+	for _, order := range currentRound.TakeProfitOrders {
+		if t := order.UpdateTime.Time().Add(coolDownInterval.Duration()); t.After(startTimeOfNextRound) {
+			startTimeOfNextRound = t
+		}
+	}
+
+	return startTimeOfNextRound
+}
+
+func classifyOrders(orders []types.Order) (opened, cancelled, filled, unexpected []types.Order) {
+	for _, order := range orders {
+		switch order.Status {
+		case types.OrderStatusNew, types.OrderStatusPartiallyFilled:
+			opened = append(opened, order)
+		case types.OrderStatusFilled:
+			filled = append(filled, order)
+		case types.OrderStatusCanceled:
+			cancelled = append(cancelled, order)
+		default:
+			unexpected = append(unexpected, order)
+		}
 	}
 
-	return time.Time{}
+	return opened, cancelled, filled, unexpected
 }

pkg/strategy/dca2/recover_test.go

@@ -23,19 +23,6 @@ func generateTestOrder(side types.SideType, status types.OrderStatus, createdAt
 
 }
 
-type MockQueryOrders struct {
-	OpenOrders   []types.Order
-	ClosedOrders []types.Order
-}
-
-func (m *MockQueryOrders) QueryOpenOrders(ctx context.Context, symbol string) ([]types.Order, error) {
-	return m.OpenOrders, nil
-}
-
-func (m *MockQueryOrders) QueryClosedOrdersDesc(ctx context.Context, symbol string, since, until time.Time, lastOrderID uint64) ([]types.Order, error) {
-	return m.ClosedOrders, nil
-}
-
 func Test_RecoverState(t *testing.T) {
 	strategy := newTestStrategy()
 
@@ -123,7 +110,9 @@ func Test_RecoverState(t *testing.T) {
 	t.Run("at take profit stage, and not filled yet", func(t *testing.T) {
 		now := time.Now()
 		currentRound := Round{
-			TakeProfitOrder: generateTestOrder(types.SideTypeSell, types.OrderStatusNew, now),
+			TakeProfitOrders: []types.Order{
+				generateTestOrder(types.SideTypeSell, types.OrderStatusNew, now),
+			},
 			OpenPositionOrders: []types.Order{
 				generateTestOrder(types.SideTypeBuy, types.OrderStatusFilled, now.Add(-1*time.Second)),
 				generateTestOrder(types.SideTypeBuy, types.OrderStatusCanceled, now.Add(-2*time.Second)),
@@ -142,7 +131,9 @@ func Test_RecoverState(t *testing.T) {
 	t.Run("at take profit stage, take-profit order filled", func(t *testing.T) {
 		now := time.Now()
 		currentRound := Round{
-			TakeProfitOrder: generateTestOrder(types.SideTypeSell, types.OrderStatusFilled, now),
+			TakeProfitOrders: []types.Order{
+				generateTestOrder(types.SideTypeSell, types.OrderStatusFilled, now),
+			},
 			OpenPositionOrders: []types.Order{
 				generateTestOrder(types.SideTypeBuy, types.OrderStatusFilled, now.Add(-1*time.Second)),
 				generateTestOrder(types.SideTypeBuy, types.OrderStatusCanceled, now.Add(-2*time.Second)),
@@ -158,3 +149,24 @@ func Test_RecoverState(t *testing.T) {
 		assert.Equal(t, WaitToOpenPosition, state)
 	})
 }
+
+func Test_classifyOrders(t *testing.T) {
+	orders := []types.Order{
+		types.Order{Status: types.OrderStatusCanceled},
+		types.Order{Status: types.OrderStatusFilled},
+		types.Order{Status: types.OrderStatusCanceled},
+		types.Order{Status: types.OrderStatusFilled},
+		types.Order{Status: types.OrderStatusPartiallyFilled},
+		types.Order{Status: types.OrderStatusCanceled},
+		types.Order{Status: types.OrderStatusPartiallyFilled},
+		types.Order{Status: types.OrderStatusNew},
+		types.Order{Status: types.OrderStatusRejected},
+		types.Order{Status: types.OrderStatusCanceled},
+	}
+
+	opened, cancelled, filled, unexpected := classifyOrders(orders)
+	assert.Equal(t, 3, len(opened))
+	assert.Equal(t, 4, len(cancelled))
+	assert.Equal(t, 2, len(filled))
+	assert.Equal(t, 1, len(unexpected))
+}

pkg/strategy/dca2/strategy.go

@@ -481,7 +481,11 @@ func (s *Strategy) UpdateProfitStats(ctx context.Context) (bool, error) {
 		}
 
 		// update profit stats FromOrderID to make sure we will not collect duplicated rounds
-		s.ProfitStats.FromOrderID = round.TakeProfitOrder.OrderID + 1
+		for _, order := range round.TakeProfitOrders {
+			if order.OrderID >= s.ProfitStats.FromOrderID {
+				s.ProfitStats.FromOrderID = order.OrderID + 1
+			}
+		}
 
 		// update quote investment
 		s.ProfitStats.QuoteInvestment = s.ProfitStats.QuoteInvestment.Add(s.ProfitStats.CurrentRoundProfit)

pkg/strategy/dca2/take_profit.go

@@ -17,8 +17,8 @@ func (s *Strategy) placeTakeProfitOrders(ctx context.Context) error {
 		return errors.Wrap(err, "failed to place the take-profit order when collecting current round")
 	}
 
-	if currentRound.TakeProfitOrder.OrderID != 0 {
-		return fmt.Errorf("there is a take-profit order before placing the take-profit order, please check it")
+	if len(currentRound.TakeProfitOrders) > 0 {
+		return fmt.Errorf("there is a take-profit order before placing the take-profit order, please check it and manually fix it")
 	}
 
 	trades, err := s.collector.CollectRoundTrades(ctx, currentRound)