diff --git a/bbgo/stock_test.go b/bbgo/stock_test.go
new file mode 100644
index 000000000..86869844d
--- /dev/null
+++ b/bbgo/stock_test.go
@@ -0,0 +1,86 @@
+package bbgo
+
+import (
+	"github.com/c9s/bbgo/pkg/bbgo/types"
+	"github.com/stretchr/testify/assert"
+	"testing"
+)
+
+func TestStockManager(t *testing.T) {
+
+	t.Run("stock", func(t *testing.T) {
+		var trades = []types.Trade{
+			{Symbol: "BTCUSDT", Price: 9100.0, Quantity: 0.05, IsBuyer: true},
+			{Symbol: "BTCUSDT", Price: 9100.0, Quantity: 0.05, IsBuyer: true},
+			{Symbol: "BTCUSDT", Price: 9200.0, Quantity: 0.01, IsBuyer: false},
+		}
+
+		var stockManager = &StockManager{
+			TradingFeeCurrency: "BNB",
+			Symbol:             "BTCUSDT",
+		}
+
+		_, err := stockManager.LoadTrades(trades)
+		assert.NoError(t, err)
+		assert.Len(t, stockManager.Stocks, 2)
+		assert.Len(t, stockManager.PendingSells, 0)
+	})
+
+	t.Run("sold out", func(t *testing.T) {
+		var trades = []types.Trade{
+			{Symbol: "BTCUSDT", Price: 9100.0, Quantity: 0.05, IsBuyer: true},
+			{Symbol: "BTCUSDT", Price: 9200.0, Quantity: 0.05, IsBuyer: false},
+			{Symbol: "BTCUSDT", Price: 9100.0, Quantity: 0.05, IsBuyer: true},
+			{Symbol: "BTCUSDT", Price: 9200.0, Quantity: 0.05, IsBuyer: false},
+		}
+
+		var stockManager = &StockManager{
+			TradingFeeCurrency: "BNB",
+			Symbol:             "BTCUSDT",
+		}
+
+		_, err := stockManager.LoadTrades(trades)
+		assert.NoError(t, err)
+		assert.Len(t, stockManager.Stocks, 0)
+		assert.Len(t, stockManager.PendingSells, 0)
+	})
+
+	t.Run("oversell", func(t *testing.T) {
+		var trades = []types.Trade{
+			{Symbol: "BTCUSDT", Price: 9100.0, Quantity: 0.05, IsBuyer: true},
+			{Symbol: "BTCUSDT", Price: 9200.0, Quantity: 0.05, IsBuyer: false},
+			{Symbol: "BTCUSDT", Price: 9200.0, Quantity: 0.05, IsBuyer: false},
+		}
+
+		var stockManager = &StockManager{
+			TradingFeeCurrency: "BNB",
+			Symbol:             "BTCUSDT",
+		}
+
+		_, err := stockManager.LoadTrades(trades)
+		assert.NoError(t, err)
+		assert.Len(t, stockManager.Stocks, 0)
+		assert.Len(t, stockManager.PendingSells, 1)
+	})
+
+
+	t.Run("loss sell", func(t *testing.T) {
+		var trades = []types.Trade{
+			{Symbol: "BTCUSDT", Price: 9100.0, Quantity: 0.05, IsBuyer: true},
+			{Symbol: "BTCUSDT", Price: 9200.0, Quantity: 0.02, IsBuyer: false},
+			{Symbol: "BTCUSDT", Price: 8000.0, Quantity: 0.01, IsBuyer: false},
+		}
+
+		var stockManager = &StockManager{
+			TradingFeeCurrency: "BNB",
+			Symbol:             "BTCUSDT",
+		}
+
+		_, err := stockManager.LoadTrades(trades)
+		assert.NoError(t, err)
+		assert.Len(t, stockManager.Stocks, 1)
+		assert.Len(t, stockManager.PendingSells, 0)
+	})
+
+
+}