From 9ec297401aff124611698d86a213ff77f211391d Mon Sep 17 00:00:00 2001
From: cfdaily <cfdaily@gitee.com>
Date: Fri, 17 Apr 2026 20:24:28 +0800
Subject: [PATCH] auto-sync: 2026-04-17 20:24:28

---
 .../atr_indicator.py                          | 21 ++++++++++---------
 1 file changed, 11 insertions(+), 10 deletions(-)

diff --git a/zhangfei-technical/research/task-20260417-atr-indicator/atr_indicator.py b/zhangfei-technical/research/task-20260417-atr-indicator/atr_indicator.py
index a0ab14c29..a7c413c50 100644
--- a/zhangfei-technical/research/task-20260417-atr-indicator/atr_indicator.py
+++ b/zhangfei-technical/research/task-20260417-atr-indicator/atr_indicator.py
@@ -214,6 +214,10 @@ class ATRIndicator:
         Returns:
             新的ATR值
         """
+        if self.method == 'sma':
+            # SMA不适合增量更新，这里简化处理，用户应该重新计算完整序列
+            raise ValueError("SMA方法不支持增量更新，请重新计算完整序列")
+        
         # 计算当前TR
         tr1 = abs(high - low)
         tr2 = abs(high - prev_close)
@@ -221,18 +225,15 @@ class ATRIndicator:
         tr = max(tr1, tr2, tr3)
         
         if self._last_atr is None:
-            # 还没有足够数据，直接返回TR
+            # 还没有足够数据，初始化ATR为TR
+            self._last_atr = tr
             return tr
         
-        if self.method == 'sma':
-            # SMA不适合增量更新，这里简化处理，用户应该重新计算完整序列
-            raise ValueError("SMA方法不支持增量更新，请重新计算完整序列")
-        else:
-            # EMA支持增量更新
-            alpha = 1.0 / self.period
-            new_atr = self._last_atr * (1 - alpha) + tr * alpha
-            self._last_atr = new_atr
-            return new_atr
+        # EMA支持增量更新
+        alpha = 1.0 / self.period
+        new_atr = self._last_atr * (1 - alpha) + tr * alpha
+        self._last_atr = new_atr
+        return new_atr
 
 
 def calculate_atr(