Merge pull request #827 from c9s/strategy/pivotshort

strategy/pivotshort: improve quantity calculation for margin and futures

pkg/exchange/util.go

@@ -0,0 +1,29 @@
+package exchange
+
+import "github.com/c9s/bbgo/pkg/types"
+
+func GetSessionAttributes(exchange types.Exchange) (isMargin, isFutures, isIsolated bool, isolatedSymbol string) {
+	if marginExchange, ok := exchange.(types.MarginExchange); ok {
+		marginSettings := marginExchange.GetMarginSettings()
+		isMargin = marginSettings.IsMargin
+		if isMargin {
+			isIsolated = marginSettings.IsIsolatedMargin
+			if marginSettings.IsIsolatedMargin {
+				isolatedSymbol = marginSettings.IsolatedMarginSymbol
+			}
+		}
+	}
+
+	if futuresExchange, ok := exchange.(types.FuturesExchange); ok {
+		futuresSettings := futuresExchange.GetFuturesSettings()
+		isFutures = futuresSettings.IsFutures
+		if isFutures {
+			isIsolated = futuresSettings.IsIsolatedFutures
+			if futuresSettings.IsIsolatedFutures {
+				isolatedSymbol = futuresSettings.IsolatedFuturesSymbol
+			}
+		}
+	}
+
+	return isMargin, isFutures, isIsolated, isolatedSymbol
+}

pkg/service/backtest.go

@@ -13,6 +13,7 @@ import (
 	"github.com/pkg/errors"
 	log "github.com/sirupsen/logrus"
 
+	exchange2 "github.com/c9s/bbgo/pkg/exchange"
 	"github.com/c9s/bbgo/pkg/exchange/batch"
 	"github.com/c9s/bbgo/pkg/types"
 )
@@ -25,7 +26,7 @@ func (s *BacktestService) SyncKLineByInterval(ctx context.Context, exchange type
 	log.Infof("synchronizing %s klines with interval %s: %s <=> %s", exchange.Name(), interval, startTime, endTime)
 
 	// TODO: use isFutures here
-	_, _, isIsolated, isolatedSymbol := getExchangeAttributes(exchange)
+	_, _, isIsolated, isolatedSymbol := exchange2.GetSessionAttributes(exchange)
 	// override symbol if isolatedSymbol is not empty
 	if isIsolated && len(isolatedSymbol) > 0 {
 		symbol = isolatedSymbol

pkg/service/deposit.go

@@ -7,6 +7,7 @@ import (
 	sq "github.com/Masterminds/squirrel"
 	"github.com/jmoiron/sqlx"
 
+	"github.com/c9s/bbgo/pkg/exchange"
 	"github.com/c9s/bbgo/pkg/exchange/batch"
 	"github.com/c9s/bbgo/pkg/types"
 )
@@ -17,7 +18,7 @@ type DepositService struct {
 
 // Sync syncs the withdraw records into db
 func (s *DepositService) Sync(ctx context.Context, ex types.Exchange, startTime time.Time) error {
-	isMargin, isFutures, isIsolated, _ := getExchangeAttributes(ex)
+	isMargin, isFutures, isIsolated, _ := exchange.GetSessionAttributes(ex)
 	if isMargin || isFutures || isIsolated {
 		// only works in spot
 		return nil

pkg/service/order.go

@@ -10,6 +10,7 @@ import (
 	"github.com/jmoiron/sqlx"
 	log "github.com/sirupsen/logrus"
 
+	exchange2 "github.com/c9s/bbgo/pkg/exchange"
 	"github.com/c9s/bbgo/pkg/exchange/batch"
 	"github.com/c9s/bbgo/pkg/types"
 )
@@ -19,7 +20,7 @@ type OrderService struct {
 }
 
 func (s *OrderService) Sync(ctx context.Context, exchange types.Exchange, symbol string, startTime time.Time) error {
-	isMargin, isFutures, isIsolated, isolatedSymbol := getExchangeAttributes(exchange)
+	isMargin, isFutures, isIsolated, isolatedSymbol := exchange2.GetSessionAttributes(exchange)
 	// override symbol if isolatedSymbol is not empty
 	if isIsolated && len(isolatedSymbol) > 0 {
 		symbol = isolatedSymbol

pkg/service/reward.go

@@ -10,6 +10,7 @@ import (
 	sq "github.com/Masterminds/squirrel"
 	"github.com/jmoiron/sqlx"
 
+	exchange2 "github.com/c9s/bbgo/pkg/exchange"
 	"github.com/c9s/bbgo/pkg/exchange/batch"
 	"github.com/c9s/bbgo/pkg/fixedpoint"
 	"github.com/c9s/bbgo/pkg/types"
@@ -29,7 +30,7 @@ func (s *RewardService) Sync(ctx context.Context, exchange types.Exchange, start
 		return ErrExchangeRewardServiceNotImplemented
 	}
 
-	isMargin, isFutures, _, _ := getExchangeAttributes(exchange)
+	isMargin, isFutures, _, _ := exchange2.GetSessionAttributes(exchange)
 	if isMargin || isFutures {
 		return nil
 	}

pkg/service/trade.go

@@ -11,6 +11,7 @@ import (
 	"github.com/pkg/errors"
 	log "github.com/sirupsen/logrus"
 
+	exchange2 "github.com/c9s/bbgo/pkg/exchange"
 	"github.com/c9s/bbgo/pkg/exchange/batch"
 	"github.com/c9s/bbgo/pkg/types"
 )
@@ -53,7 +54,7 @@ func NewTradeService(db *sqlx.DB) *TradeService {
 }
 
 func (s *TradeService) Sync(ctx context.Context, exchange types.Exchange, symbol string, startTime time.Time) error {
-	isMargin, isFutures, isIsolated, isolatedSymbol := getExchangeAttributes(exchange)
+	isMargin, isFutures, isIsolated, isolatedSymbol := exchange2.GetSessionAttributes(exchange)
 	// override symbol if isolatedSymbol is not empty
 	if isIsolated && len(isolatedSymbol) > 0 {
 		symbol = isolatedSymbol
@@ -412,28 +413,3 @@ func SelectLastTrades(ex types.ExchangeName, symbol string, isMargin, isFutures,
 		Limit(limit)
 }
 
-func getExchangeAttributes(exchange types.Exchange) (isMargin, isFutures, isIsolated bool, isolatedSymbol string) {
-	if marginExchange, ok := exchange.(types.MarginExchange); ok {
-		marginSettings := marginExchange.GetMarginSettings()
-		isMargin = marginSettings.IsMargin
-		if isMargin {
-			isIsolated = marginSettings.IsIsolatedMargin
-			if marginSettings.IsIsolatedMargin {
-				isolatedSymbol = marginSettings.IsolatedMarginSymbol
-			}
-		}
-	}
-
-	if futuresExchange, ok := exchange.(types.FuturesExchange); ok {
-		futuresSettings := futuresExchange.GetFuturesSettings()
-		isFutures = futuresSettings.IsFutures
-		if isFutures {
-			isIsolated = futuresSettings.IsIsolatedFutures
-			if futuresSettings.IsIsolatedFutures {
-				isolatedSymbol = futuresSettings.IsolatedFuturesSymbol
-			}
-		}
-	}
-
-	return isMargin, isFutures, isIsolated, isolatedSymbol
-}

pkg/service/withdraw.go

@@ -7,6 +7,7 @@ import (
 	sq "github.com/Masterminds/squirrel"
 	"github.com/jmoiron/sqlx"
 
+	"github.com/c9s/bbgo/pkg/exchange"
 	"github.com/c9s/bbgo/pkg/exchange/batch"
 	"github.com/c9s/bbgo/pkg/types"
 )
@@ -17,7 +18,7 @@ type WithdrawService struct {
 
 // Sync syncs the withdrawal records into db
 func (s *WithdrawService) Sync(ctx context.Context, ex types.Exchange, startTime time.Time) error {
-	isMargin, isFutures, isIsolated, _ := getExchangeAttributes(ex)
+	isMargin, isFutures, isIsolated, _ := exchange.GetSessionAttributes(ex)
 	if isMargin || isFutures || isIsolated {
 		// only works in spot
 		return nil

pkg/strategy/pivotshort/breaklow.go

@@ -2,10 +2,12 @@ package pivotshort
 
 import (
 	"context"
+	"fmt"
 
 	"github.com/c9s/bbgo/pkg/bbgo"
 	"github.com/c9s/bbgo/pkg/fixedpoint"
 	"github.com/c9s/bbgo/pkg/indicator"
+	"github.com/c9s/bbgo/pkg/risk"
 	"github.com/c9s/bbgo/pkg/types"
 )
 
@@ -25,6 +27,7 @@ type BreakLow struct {
 	// limit sell price = breakLowPrice * (1 + BounceRatio)
 	BounceRatio fixedpoint.Value `json:"bounceRatio"`
 
+	Leverage     fixedpoint.Value      `json:"leverage"`
 	Quantity     fixedpoint.Value      `json:"quantity"`
 	StopEMARange fixedpoint.Value      `json:"stopEMARange"`
 	StopEMA      *types.IntervalWindow `json:"stopEMA"`
@@ -63,8 +66,8 @@ func (s *BreakLow) Bind(session *bbgo.ExchangeSession, orderExecutor *bbgo.Gener
 
 	position := orderExecutor.Position()
 	symbol := position.Symbol
-	store, _ := session.MarketDataStore(symbol)
+	store, _ := session.MarketDataStore(s.Symbol)
-	standardIndicator, _ := session.StandardIndicatorSet(symbol)
+	standardIndicator, _ := session.StandardIndicatorSet(s.Symbol)
 
 	s.lastLow = fixedpoint.Zero
 
@@ -168,7 +171,15 @@ func (s *BreakLow) Bind(session *bbgo.ExchangeSession, orderExecutor *bbgo.Gener
 		// graceful cancel all active orders
 		_ = orderExecutor.GracefulCancel(ctx)
 
-		quantity := s.useQuantityOrBaseBalance(s.Quantity)
+		quantity, err := useQuantityOrBaseBalance(s.session, s.Market, closePrice, s.Quantity, s.Leverage)
+		if err != nil {
+			log.WithError(err).Errorf("quantity calculation error")
+		}
+
+		if quantity.IsZero() {
+			return
+		}
+
 		if s.MarketOrder {
 			bbgo.Notify("%s price %f breaks the previous low %f with ratio %f, submitting market sell to open a short position", symbol, kline.Close.Float64(), previousLow.Float64(), s.Ratio.Float64())
 			_, _ = s.orderExecutor.SubmitOrders(ctx, types.SubmitOrder{
@@ -204,24 +215,70 @@ func (s *BreakLow) Bind(session *bbgo.ExchangeSession, orderExecutor *bbgo.Gener
 	}
 }
 
-func (s *BreakLow) useQuantityOrBaseBalance(quantity fixedpoint.Value) fixedpoint.Value {
+func useQuantityOrBaseBalance(session *bbgo.ExchangeSession, market types.Market, price, quantity, leverage fixedpoint.Value) (fixedpoint.Value, error) {
-	if s.session.Margin || s.session.IsolatedMargin || s.session.Futures || s.session.IsolatedFutures {
+	usingLeverage := session.Margin || session.IsolatedMargin || session.Futures || session.IsolatedFutures
-		return quantity
+	if usingLeverage {
+		if !quantity.IsZero() {
+			return quantity, nil
+		}
+
+		if leverage.IsZero() {
+			leverage = fixedpoint.NewFromInt(3)
+		}
+
+		// quantity is zero, we need to calculate the quantity
+		baseBalance, _ := session.Account.Balance(market.BaseCurrency)
+		quoteBalance, _ := session.Account.Balance(market.QuoteCurrency)
+
+		// calculate the quantity automatically
+		if session.Margin || session.IsolatedMargin {
+			baseBalanceValue := baseBalance.Total().Mul(price)
+			accountValue := baseBalanceValue.Add(quoteBalance.Total())
+
+			if session.IsolatedMargin {
+				originLeverage := leverage
+				leverage = fixedpoint.Max(leverage, fixedpoint.NewFromInt(10))
+				log.Infof("using isolated margin, maxLeverage=10 originalLeverage=%f currentLeverage=%f",
+					originLeverage.Float64(),
+					leverage.Float64())
+			}
+
+			// spot margin use the equity value, so we use the total quote balance here
+			maxPositionQuantity := risk.CalculateMaxPosition(price, accountValue, leverage)
+
+			log.Infof("margin leverage: calculated maxPositionQuantity=%f price=%f accountValue=%f %s leverage=%f",
+				maxPositionQuantity.Float64(),
+				price.Float64(),
+				accountValue.Float64(),
+				market.QuoteCurrency,
+				leverage.Float64())
+
+			return maxPositionQuantity, nil
+		}
+
+		if session.Futures || session.IsolatedFutures {
+			// TODO: get mark price here
+			maxPositionQuantity := risk.CalculateMaxPosition(price, quoteBalance.Available, leverage)
+			requiredPositionCost := risk.CalculatePositionCost(price, price, maxPositionQuantity, leverage, types.SideTypeSell)
+			if quoteBalance.Available.Compare(requiredPositionCost) < 0 {
+				return maxPositionQuantity, fmt.Errorf("available margin %f %s is not enough, can not submit order", quoteBalance.Available.Float64(), market.QuoteCurrency)
+			}
+
+			return maxPositionQuantity, nil
+		}
+
 	}
 
-	balance, hasBalance := s.session.Account.Balance(s.Market.BaseCurrency)
+	// For spot, we simply sell the base currency
+	balance, hasBalance := session.Account.Balance(market.BaseCurrency)
 	if hasBalance {
 		if quantity.IsZero() {
-			bbgo.Notify("sell quantity is not set, submitting sell with all base balance: %s", balance.Available.String())
+			log.Warnf("sell quantity is not set, submitting sell with all base balance: %s", balance.Available.String())
 			quantity = balance.Available
 		} else {
 			quantity = fixedpoint.Min(quantity, balance.Available)
 		}
 	}
 
-	if quantity.IsZero() {
+	return quantity, fmt.Errorf("quantity is zero, can not submit sell order, please check your settings")
-		log.Errorf("quantity is zero, can not submit sell order, please check settings")
-	}
-
-	return quantity
 }

pkg/strategy/pivotshort/resistance.go

@@ -37,6 +37,10 @@ func (s *ResistanceShort) Bind(session *bbgo.ExchangeSession, orderExecutor *bbg
 	s.session = session
 	s.orderExecutor = orderExecutor
 	s.activeOrders = bbgo.NewActiveOrderBook(s.Symbol)
+	s.activeOrders.OnFilled(func(o types.Order) {
+		// reset resistance price
+		s.currentResistancePrice = fixedpoint.Zero
+	})
 	s.activeOrders.BindStream(session.UserDataStream)
 
 	if s.GroupDistance.IsZero() {
@@ -112,7 +116,10 @@ func (s *ResistanceShort) updateResistanceOrders(closePrice fixedpoint.Value) {
 	ctx := context.Background()
 	resistanceUpdated := s.updateCurrentResistancePrice(closePrice)
 	if resistanceUpdated {
-		bbgo.Notify("%s Found next resistance price at %f, updating resistance order...", s.Symbol, s.currentResistancePrice.Float64())
+		bbgo.Notify("Found next %s resistance price at %f, updating resistance orders...", s.Symbol, s.currentResistancePrice.Float64())
+		s.placeResistanceOrders(ctx, s.currentResistancePrice)
+	} else if s.activeOrders.NumOfOrders() == 0 && !s.currentResistancePrice.IsZero() {
+		bbgo.Notify("There is no %s resistance open order, re-placing resistance orders at %f...", s.Symbol, s.currentResistancePrice.Float64())
 		s.placeResistanceOrders(ctx, s.currentResistancePrice)
 	}
 }

pkg/strategy/pivotshort/strategy.go

@@ -155,7 +155,11 @@ type Strategy struct {
 	// pivot interval and window
 	types.IntervalWindow
 
+	Leverage fixedpoint.Value `json:"leverage"`
+	Quantity fixedpoint.Value `json:"quantity"`
+
 	// persistence fields
+
 	Position    *types.Position    `persistence:"position"`
 	ProfitStats *types.ProfitStats `persistence:"profit_stats"`
 	TradeStats  *types.TradeStats  `persistence:"trade_stats"`
@@ -177,7 +181,6 @@ type Strategy struct {
 	bbgo.StrategyController
 }
 
-
 func (s *Strategy) ID() string {
 	return ID
 }
@@ -236,6 +239,11 @@ func (s *Strategy) Run(ctx context.Context, orderExecutor bbgo.OrderExecutor, se
 		s.TradeStats = types.NewTradeStats(s.Symbol)
 	}
 
+	if s.Leverage.IsZero() {
+		// the default leverage is 3x
+		s.Leverage = fixedpoint.NewFromInt(3)
+	}
+
 	// StrategyController
 	s.Status = types.StrategyStatusRunning