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				@@ -3,6 +3,7 @@ package sentio 
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				 import ( 
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				 	"context" 
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				 	"errors" 
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				+	"time" 
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				 ) 
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				 var ( 
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				@@ -25,6 +26,8 @@ type Market interface { 
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				 	Portfolio() (Portfolio, error) 
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				 	PortfolioHistory() ([]PortfolioRecord, error) 
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				+	HistoricalBars(symbol string, interval time.Duration, from *time.Time) ([]Bar, error) 
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				+ 
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				 	Account() (MarketAccount, error) 
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				 	MaxBudget() float64 
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				 	Cooldown() uint8 
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