diff --git a/leopard-core/src/main/java/com/lanyuanxiaoyao/leopard/core/strategy/TradeEngine.java b/leopard-core/src/main/java/com/lanyuanxiaoyao/leopard/core/strategy/TradeEngine.java
new file mode 100644
index 0000000..b3531af
--- /dev/null
+++ b/leopard-core/src/main/java/com/lanyuanxiaoyao/leopard/core/strategy/TradeEngine.java
@@ -0,0 +1,49 @@
+package com.lanyuanxiaoyao.leopard.core.strategy;
+
+import com.lanyuanxiaoyao.leopard.core.entity.Daily;
+import com.lanyuanxiaoyao.leopard.core.repository.DailyRepository;
+import java.time.LocalDate;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.stereotype.Service;
+
+/**
+ * 交易策略
+ *
+ * @author lanyuanxiaoyao
+ * @version 20251016
+ */
+@Slf4j
+@Service
+public class TradeEngine {
+  private final DailyRepository dailyRepository;
+
+  public TradeEngine(DailyRepository dailyRepository) {
+    this.dailyRepository = dailyRepository;
+  }
+
+  public void backtest(List<Long> stocks, TradeStrategy strategy) {
+  }
+
+  public interface TradeStrategy {
+    List<Trade> trade(LocalDate now, Asset asset, Map<Long, List<Daily>> dailies);
+  }
+
+  public record Asset(
+    Double cash,
+    Map<Long, Double> stocks
+  ) {
+    public Asset() {
+      this(0.0, new HashMap<>());
+    }
+  }
+
+  public record Trade(
+    Long stockId,
+    // 用正负数表达买卖
+    Integer volume
+  ) {
+  }
+}