bbgo_origin/pkg/strategy/bollmaker/quantity.go

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package bollmaker
import "github.com/c9s/bbgo/pkg/fixedpoint"
// QuantityOrAmount is a setting structure used for quantity/amount settings
type QuantityOrAmount struct {
// Quantity is the base order quantity for your buy/sell order.
// when quantity is set, the amount option will be not used.
Quantity fixedpoint.Value `json:"quantity"`
// Amount is the order quote amount for your buy/sell order.
Amount fixedpoint.Value `json:"amount"`
}
// CalculateQuantity calculates the equivalent quantity of the given price when amount is set
// it returns the quantity if the quantity is set
func (qa *QuantityOrAmount) CalculateQuantity(currentPrice fixedpoint.Value) fixedpoint.Value {
if qa.Amount > 0 {
quantity := qa.Amount.Div(currentPrice)
return quantity
}
return qa.Quantity
}