EXPMA指标

src/main/java/com/deepchart/controller/IndexController.java

@@ -39,4 +39,11 @@ public class IndexController {
         String result = indexService.cci(list);
         return Result.success("success", result);
     }
+
+    @PostMapping("/expma")
+    public Result expma(@RequestBody StockInfo stock) {
+        List<StockDailyData> list = indexService.getStockData(stock);
+        String result = indexService.expma(list);
+        return Result.success("success", result);
+    }
 }

src/main/java/com/deepchart/service/IndexService.java

@@ -13,4 +13,6 @@ public interface IndexService {
     String ma(List<StockDailyData> list);
 
     String cci(List<StockDailyData> list);
+
+    String expma(List<StockDailyData> list);
 }

src/main/java/com/deepchart/service/impl/IndexServiceImpl.java

@@ -3,10 +3,7 @@ package com.deepchart.service.impl;
 import com.deepchart.entity.StockDailyData;
 import com.deepchart.entity.StockInfo;
 import com.deepchart.service.IndexService;
-import com.deepchart.utils.CCIUtil;
-import com.deepchart.utils.MACDUtil;
-import com.deepchart.utils.MAUtil;
-import com.deepchart.utils.StockDataUtil;
+import com.deepchart.utils.*;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Service;
 
@@ -37,4 +34,9 @@ public class IndexServiceImpl implements IndexService {
     public String cci(List<StockDailyData> list) {
         return CCIUtil.analyzeCCI(list);
     }
+
+    @Override
+    public String expma(List<StockDailyData> list) {
+        return EXPMAUtil.analyzeEXPMA(list,12,40);
+    }
 }

src/main/java/com/deepchart/utils/EXPMAUtil.java

@@ -0,0 +1,156 @@
+package com.deepchart.utils;
+
+import com.deepchart.entity.StockDailyData;
+
+import java.time.LocalDate;
+import java.util.*;
+
+public class EXPMAUtil {
+
+    public static String analyzeEXPMA(List<StockDailyData> stockData, int shortPeriod, int longPeriod) {
+        if (stockData == null || stockData.size() < Math.max(shortPeriod, longPeriod)) {
+            return "数据不足，无法进行 EXPMA 分析。请至少提供 " + Math.max(shortPeriod, longPeriod) + " 天数据。";
+        }
+
+        // 1. 计算 EXPMA
+        List<Double> expmaShort = calculateSingleExpma(stockData, shortPeriod);
+        List<Double> expmaLong = calculateSingleExpma(stockData, longPeriod);
+
+        int n = stockData.size();
+        LocalDate latestDate = stockData.get(n - 1).getDate();
+        double latestPrice = stockData.get(n - 1).getClosePrice();
+        double currentShort = expmaShort.get(n - 1);
+        double currentLong = expmaLong.get(n - 1);
+
+        StringBuilder analysis = new StringBuilder();
+        analysis.append("📊 EXPMA 趋势分析（截至 ").append(latestDate).append("）\n");
+        analysis.append("   • 短期EXPMA(").append(shortPeriod).append("): ").append(String.format("%.2f", currentShort)).append("\n");
+        analysis.append("   • 长期EXPMA(").append(longPeriod).append("): ").append(String.format("%.2f", currentLong)).append("\n");
+        analysis.append("   • 当前收盘价: ").append(String.format("%.2f", latestPrice)).append("\n\n");
+
+        // 2. 判断多头/空头排列
+        boolean isBullish = currentShort > currentLong;
+        boolean shortUp = n >= 2 && expmaShort.get(n - 1) > expmaShort.get(n - 2);
+        boolean longUp = n >= 2 && expmaLong.get(n - 1) > expmaLong.get(n - 2);
+
+        if (isBullish && shortUp && longUp) {
+            analysis.append("📈 趋势状态：【多头排列】\n");
+            analysis.append("   → 市场处于上升趋势，短期均线在长期均线上方且双双上行。\n");
+            if (latestPrice >= currentShort) {
+                analysis.append("   → 股价站稳短期EXPMA之上，强势格局。\n");
+            } else {
+                analysis.append("   → 股价回踩短期EXPMA，若不破可视为加仓机会。\n");
+            }
+        } else if (!isBullish && !shortUp && !longUp) {
+            analysis.append("📉 趋势状态：【空头排列】\n");
+            analysis.append("   → 市场处于下降趋势，短期均线在长期均线下方且双双下行。\n");
+            if (latestPrice <= currentShort) {
+                analysis.append("   → 股价受压于短期EXPMA，弱势明显，建议观望。\n");
+            } else {
+                analysis.append("   → 股价反弹至短期EXPMA附近，可能是做空或减仓时机。\n");
+            }
+        } else {
+            analysis.append("🔄 趋势状态：【震荡整理】\n");
+            analysis.append("   → 均线缠绕或方向不一致，市场缺乏明确趋势。\n");
+        }
+
+        // 3. 检测最近是否发生金叉/死叉（过去5日内）
+        boolean goldenCross = false;
+        boolean deathCross = false;
+        int crossDayIndex = -1;
+        String crossType = "";
+
+        // 从后往前找最近一次交叉（最多看最近10天）
+        int lookback = Math.min(10, n - 1);
+        for (int i = n - 1; i >= lookback; i--) {
+            double shortToday = expmaShort.get(i);
+            double longToday = expmaLong.get(i);
+            double shortYesterday = expmaShort.get(i - 1);
+            double longYesterday = expmaLong.get(i - 1);
+
+            // 金叉：昨日 short <= long，今日 short > long
+            if (shortYesterday <= longYesterday && shortToday > longToday) {
+                goldenCross = true;
+                crossDayIndex = i;
+                crossType = "黄金交叉";
+                break;
+            }
+            // 死叉：昨日 short >= long，今日 short < long
+            if (shortYesterday >= longYesterday && shortToday < longToday) {
+                deathCross = true;
+                crossDayIndex = i;
+                crossType = "死亡交叉";
+                break;
+            }
+        }
+
+        if (goldenCross || deathCross) {
+            LocalDate crossDate = stockData.get(crossDayIndex).getDate();
+            analysis.append("\n🔔 近期信号：")
+                    .append(crossType)
+                    .append("（").append(crossDate).append("）\n");
+            if (goldenCross) {
+                analysis.append("   → 短期动能转强，可视为潜在买入信号。\n");
+                if (currentLong > expmaLong.get(Math.max(0, crossDayIndex - 5))) {
+                    analysis.append("   → 且长期EXPMA已走平或向上，信号可靠性较高。\n");
+                }
+            } else {
+                analysis.append("   → 短期动能转弱，可视为潜在卖出信号。\n");
+            }
+        }
+
+        // 4. 支撑/阻力提示
+        if (isBullish) {
+            double support = currentShort;
+            if (Math.abs(latestPrice - support) / support < 0.01) { // 价格接近短期EXPMA（1%内）
+                analysis.append("\n🛡️ 支撑观察：当前股价接近短期EXPMA（")
+                        .append(String.format("%.2f", support))
+                        .append("），若在此企稳，可能延续升势。\n");
+            }
+        } else if (!isBullish) {
+            double resistance = currentShort;
+            if (Math.abs(latestPrice - resistance) / resistance < 0.01) {
+                analysis.append("\n⚠️ 阻力观察：当前股价接近短期EXPMA（")
+                        .append(String.format("%.2f", resistance))
+                        .append("），若遇阻回落，可能延续跌势。\n");
+            }
+        }
+
+        // 5. 总结建议
+        analysis.append("\n📌 操作建议：\n");
+        if (isBullish && shortUp) {
+            analysis.append("   • 多头趋势中，持股待涨；回调至短期EXPMA附近可考虑低吸。\n");
+        } else if (!isBullish && !shortUp) {
+            analysis.append("   • 空头趋势中，避免抄底；反弹至短期EXPMA附近可考虑离场。\n");
+        } else {
+            analysis.append("   • 市场方向不明，建议结合成交量或震荡指标（如KDJ）辅助决策。\n");
+        }
+        analysis.append("\n❗ 注意：EXPMA为趋势跟踪指标，在横盘震荡市中易产生假信号，请勿单独依赖。");
+
+        return analysis.toString();
+    }
+
+    // 辅助方法：计算单周期 EXPMA
+    private static List<Double> calculateSingleExpma(List<StockDailyData> data, int period) {
+        List<Double> expma = new ArrayList<>(data.size());
+        double alpha = 2.0 / (period + 1);
+        double value = 0.0;
+
+        for (int i = 0; i < data.size(); i++) {
+            double price = data.get(i).getClosePrice();
+            if (i == 0) {
+                // 初始值用 SMA(period)
+                double sum = 0;
+                int count = Math.min(period, data.size());
+                for (int j = 0; j < count; j++) {
+                    sum += data.get(j).getClosePrice();
+                }
+                value = sum / count;
+            } else {
+                value = alpha * price + (1 - alpha) * value;
+            }
+            expma.add(value);
+        }
+        return expma;
+    }
+}