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strategy: add PositionCloser function for support strategy
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parent
c9fe182c36
commit
72a6877094
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@ -166,6 +166,8 @@ type Strategy struct {
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ScaleQuantity *bbgo.PriceVolumeScale `json:"scaleQuantity"`
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orderExecutor bbgo.OrderExecutor
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tradeCollector *bbgo.TradeCollector
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orderStore *bbgo.OrderStore
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@ -211,6 +213,42 @@ func (s *Strategy) CurrentPosition() *types.Position {
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return s.state.Position
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}
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func (s *Strategy) ClosePosition(ctx context.Context, percentage fixedpoint.Value) error {
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base := s.state.Position.GetBase()
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if base.IsZero() {
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return fmt.Errorf("no opened %s position", s.state.Position.Symbol)
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}
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// make it negative
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quantity := base.Mul(percentage).Abs()
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side := types.SideTypeBuy
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if base.Sign() > 0 {
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side = types.SideTypeSell
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}
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if quantity.Compare(s.Market.MinQuantity) < 0 {
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return fmt.Errorf("order quantity %v is too small, less than %v", quantity, s.Market.MinQuantity)
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}
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submitOrder := types.SubmitOrder{
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Symbol: s.Symbol,
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Side: side,
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Type: types.OrderTypeMarket,
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Quantity: quantity,
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Market: s.Market,
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}
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s.Notify("Submitting %s %s order to close position by %v", s.Symbol, side.String(), percentage, submitOrder)
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createdOrders, err := s.submitOrders(ctx, s.orderExecutor, submitOrder)
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if err != nil {
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log.WithError(err).Errorf("can not place position close order")
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}
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s.orderStore.Add(createdOrders...)
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return err
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}
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func (s *Strategy) SaveState() error {
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if err := s.Persistence.Save(s.state, ID, s.Symbol, stateKey); err != nil {
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return err
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@ -344,6 +382,8 @@ func (s *Strategy) calculateQuantity(session *bbgo.ExchangeSession, side types.S
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}
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func (s *Strategy) Run(ctx context.Context, orderExecutor bbgo.OrderExecutor, session *bbgo.ExchangeSession) error {
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s.orderExecutor = orderExecutor
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// set default values
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if s.Interval == "" {
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s.Interval = types.Interval5m
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