package pivotshort import ( "context" "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" ) type StopEMA struct { types.IntervalWindow Range fixedpoint.Value `json:"range"` } type FakeBreakStop struct { types.IntervalWindow } // BreakLow -- when price breaks the previous pivot low, we set a trade entry type BreakLow struct { Symbol string Market types.Market types.IntervalWindow // Ratio is a number less than 1.0, price * ratio will be the price triggers the short order. Ratio fixedpoint.Value `json:"ratio"` // MarketOrder is the option to enable market order short. MarketOrder bool `json:"marketOrder"` // BounceRatio is a ratio used for placing the limit order sell price // limit sell price = breakLowPrice * (1 + BounceRatio) BounceRatio fixedpoint.Value `json:"bounceRatio"` Leverage fixedpoint.Value `json:"leverage"` Quantity fixedpoint.Value `json:"quantity"` StopEMA *StopEMA `json:"stopEMA"` TrendEMA *TrendEMA `json:"trendEMA"` FakeBreakStop *FakeBreakStop `json:"fakeBreakStop"` lastLow fixedpoint.Value // lastBreakLow is the low that the price just break lastBreakLow fixedpoint.Value pivotLow *indicator.PivotLow pivotLowPrices []fixedpoint.Value stopEWMA *indicator.EWMA trendEWMALast, trendEWMACurrent float64 orderExecutor *bbgo.GeneralOrderExecutor session *bbgo.ExchangeSession } func (s *BreakLow) Subscribe(session *bbgo.ExchangeSession) { session.Subscribe(types.KLineChannel, s.Symbol, types.SubscribeOptions{Interval: s.Interval}) session.Subscribe(types.KLineChannel, s.Symbol, types.SubscribeOptions{Interval: types.Interval1m}) if s.StopEMA != nil { session.Subscribe(types.KLineChannel, s.Symbol, types.SubscribeOptions{Interval: s.StopEMA.Interval}) } if s.TrendEMA != nil { session.Subscribe(types.KLineChannel, s.Symbol, types.SubscribeOptions{Interval: s.TrendEMA.Interval}) } if s.FakeBreakStop != nil { session.Subscribe(types.KLineChannel, s.Symbol, types.SubscribeOptions{Interval: s.FakeBreakStop.Interval}) } } func (s *BreakLow) Bind(session *bbgo.ExchangeSession, orderExecutor *bbgo.GeneralOrderExecutor) { s.session = session s.orderExecutor = orderExecutor position := orderExecutor.Position() symbol := position.Symbol standardIndicator := session.StandardIndicatorSet(s.Symbol) s.lastLow = fixedpoint.Zero s.pivotLow = standardIndicator.PivotLow(s.IntervalWindow) if s.StopEMA != nil { s.stopEWMA = standardIndicator.EWMA(s.StopEMA.IntervalWindow) } if s.TrendEMA != nil { if s.TrendEMA.MaxGradient == 0.0 { s.TrendEMA.MaxGradient = 1.0 } s.TrendEMA.Bind(session, orderExecutor) } // update pivot low data session.MarketDataStream.OnStart(func() { if s.updatePivotLow() { bbgo.Notify("%s new pivot low: %f", s.Symbol, s.pivotLow.Last()) } s.pilotQuantityCalculation() }) session.MarketDataStream.OnKLineClosed(types.KLineWith(symbol, s.Interval, func(kline types.KLine) { if s.updatePivotLow() { // when position is opened, do not send pivot low notify if position.IsOpened(kline.Close) { return } bbgo.Notify("%s new pivot low: %f", s.Symbol, s.pivotLow.Last()) } })) if s.FakeBreakStop != nil { // if the position is already opened, and we just break the low, this checks if the kline closed above the low, // so that we can close the position earlier session.MarketDataStream.OnKLineClosed(types.KLineWith(s.Symbol, s.FakeBreakStop.Interval, func(k types.KLine) { // make sure the position is opened, and it's a short position if !position.IsOpened(k.Close) || !position.IsShort() { return } // make sure we recorded the last break low if s.lastBreakLow.IsZero() { return } // the kline opened below the last break low, and closed above the last break low if k.Open.Compare(s.lastBreakLow) < 0 && k.Close.Compare(s.lastBreakLow) > 0 { bbgo.Notify("kLine closed above the last break low, triggering stop earlier") if err := s.orderExecutor.ClosePosition(context.Background(), one, "fakeBreakStop"); err != nil { log.WithError(err).Error("position close error") } // reset to zero s.lastBreakLow = fixedpoint.Zero } })) } session.MarketDataStream.OnKLineClosed(types.KLineWith(s.Symbol, types.Interval1m, func(kline types.KLine) { if len(s.pivotLowPrices) == 0 { log.Infof("currently there is no pivot low prices, can not check break low...") return } previousLow := s.pivotLowPrices[len(s.pivotLowPrices)-1] ratio := fixedpoint.One.Add(s.Ratio) breakPrice := previousLow.Mul(ratio) openPrice := kline.Open closePrice := kline.Close // if the previous low is not break, or the kline is not strong enough to break it, skip if closePrice.Compare(breakPrice) >= 0 { return } // we need the price cross the break line, or we do nothing: // open > break price > close price if !(openPrice.Compare(breakPrice) > 0 && closePrice.Compare(breakPrice) < 0) { return } // force direction to be down if closePrice.Compare(openPrice) >= 0 { log.Infof("%s price %f is closed higher than the open price %f, skip this break", kline.Symbol, closePrice.Float64(), openPrice.Float64()) // skip UP klines return } log.Infof("%s breakLow signal detected, closed price %f < breakPrice %f", kline.Symbol, closePrice.Float64(), breakPrice.Float64()) if s.lastBreakLow.IsZero() || previousLow.Compare(s.lastBreakLow) < 0 { s.lastBreakLow = previousLow } if position.IsOpened(kline.Close) { log.Infof("position is already opened, skip short") return } // trend EMA protection if s.TrendEMA != nil && !s.TrendEMA.GradientAllowed() { return } // stop EMA protection if s.stopEWMA != nil { ema := fixedpoint.NewFromFloat(s.stopEWMA.Last()) if ema.IsZero() { return } emaStopShortPrice := ema.Mul(fixedpoint.One.Sub(s.StopEMA.Range)) if closePrice.Compare(emaStopShortPrice) < 0 { log.Infof("stopEMA protection: close price %f < EMA(%v %f) * (1 - RANGE %f) = %f", closePrice.Float64(), s.StopEMA, ema.Float64(), s.StopEMA.Range.Float64(), emaStopShortPrice.Float64()) return } } ctx := context.Background() // graceful cancel all active orders _ = orderExecutor.GracefulCancel(ctx) quantity, err := risk.CalculateBaseQuantity(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{ Symbol: s.Symbol, Side: types.SideTypeSell, Type: types.OrderTypeMarket, Quantity: quantity, MarginSideEffect: types.SideEffectTypeMarginBuy, Tag: "breakLowMarket", }) } else { sellPrice := previousLow.Mul(fixedpoint.One.Add(s.BounceRatio)) bbgo.Notify("%s price %f breaks the previous low %f with ratio %f, submitting limit sell @ %f", symbol, kline.Close.Float64(), previousLow.Float64(), s.Ratio.Float64(), sellPrice.Float64()) _, _ = s.orderExecutor.SubmitOrders(ctx, types.SubmitOrder{ Symbol: kline.Symbol, Side: types.SideTypeSell, Type: types.OrderTypeLimit, Price: sellPrice, Quantity: quantity, MarginSideEffect: types.SideEffectTypeMarginBuy, Tag: "breakLowLimit", }) } })) } func (s *BreakLow) pilotQuantityCalculation() { log.Infof("pilot calculation for max position: last low = %f, quantity = %f, leverage = %f", s.lastLow.Float64(), s.Quantity.Float64(), s.Leverage.Float64()) quantity, err := risk.CalculateBaseQuantity(s.session, s.Market, s.lastLow, s.Quantity, s.Leverage) if err != nil { log.WithError(err).Errorf("quantity calculation error") } if quantity.IsZero() { log.WithError(err).Errorf("quantity is zero, can not submit order") return } bbgo.Notify("%s %f quantity will be used for shorting", s.Symbol, quantity.Float64()) } func (s *BreakLow) updatePivotLow() bool { lastLow := fixedpoint.NewFromFloat(s.pivotLow.Last()) if lastLow.IsZero() || lastLow.Compare(s.lastLow) == 0 { return false } s.lastLow = lastLow s.pivotLowPrices = append(s.pivotLowPrices, lastLow) return true }