diff --git a/backend_api_python/app/config/__init__.py b/backend_api_python/app/config/__init__.py
index 705d12d9c..c3f042efc 100644
--- a/backend_api_python/app/config/__init__.py
+++ b/backend_api_python/app/config/__init__.py
@@ -7,6 +7,7 @@
     FinnhubConfig,
     TradingEconomicsConfig,
     TiingoConfig,
+    FXMacroDataConfig,
     YFinanceConfig,
     CCXTConfig,
     AkshareConfig
@@ -24,6 +25,7 @@
     'FinnhubConfig',
     'TradingEconomicsConfig',
     'TiingoConfig',
+    'FXMacroDataConfig',
     'YFinanceConfig',
     'CCXTConfig',
     'AkshareConfig',
diff --git a/backend_api_python/app/config/data_sources.py b/backend_api_python/app/config/data_sources.py
index b95f05d0c..c70cd3a70 100644
--- a/backend_api_python/app/config/data_sources.py
+++ b/backend_api_python/app/config/data_sources.py
@@ -283,6 +283,27 @@ class TiingoConfig(metaclass=MetaTiingoConfig):
     pass
 
 
+class MetaFXMacroDataConfig(type):
+    @property
+    def BASE_URL(cls):
+        return _config_str('fxmacrodata', 'base_url', 'FXMACRODATA_BASE_URL', 'https://api.fxmacrodata.com/v1').rstrip('/')
+
+    @property
+    def API_KEY(cls):
+        return _config_str('fxmacrodata', 'api_key', 'FXMACRODATA_API_KEY') or _config_str(
+            'fxmacrodata', 'api_key', 'FXMD_API_KEY'
+        )
+
+    @property
+    def TIMEOUT(cls):
+        return _config_int('fxmacrodata', 'timeout', 'FXMACRODATA_TIMEOUT', 12)
+
+
+class FXMacroDataConfig(metaclass=MetaFXMacroDataConfig):
+    """FXMacroData daily FX reference-rate configuration."""
+    pass
+
+
 class MetaYFinanceConfig(type):
     @property
     def TIMEOUT(cls):
diff --git a/backend_api_python/app/data_sources/forex.py b/backend_api_python/app/data_sources/forex.py
index 59fdbaa67..a22b3e5e0 100644
--- a/backend_api_python/app/data_sources/forex.py
+++ b/backend_api_python/app/data_sources/forex.py
@@ -1,9 +1,9 @@
 """
 外汇数据源
-三级降级: Twelve Data → Tiingo → yfinance
+四级降级: FXMacroData(日线参考汇率) → Twelve Data → Tiingo → yfinance
 """
 from typing import Dict, List, Any, Optional
-from datetime import datetime, timedelta
+from datetime import datetime, timedelta, timezone
 import os
 import time
 import requests
@@ -12,7 +12,7 @@
 
 from app.data_sources.base import BaseDataSource, TIMEFRAME_SECONDS
 from app.utils.logger import get_logger
-from app.config import TiingoConfig, APIKeys
+from app.config import TiingoConfig, FXMacroDataConfig, APIKeys
 
 logger = get_logger(__name__)
 
@@ -321,10 +321,11 @@ def get_kline(
     ) -> List[Dict[str, Any]]:
         """
         获取外汇K线数据
-        Priority: Twelve Data → Tiingo → yfinance
+        Priority: FXMacroData (daily reference rates) → Twelve Data → Tiingo → yfinance
         """
         symbol = normalize_forex_pair_symbol(symbol)
         for fetcher in (
+            self._get_kline_fxmacrodata,
             self._get_kline_twelvedata,
             self._get_kline_tiingo,
             self._get_kline_yfinance,
@@ -343,6 +344,93 @@ def get_kline(
                 logger.debug("Forex kline fetcher %s failed for %s: %s", fetcher.__name__, symbol, e)
         return []
 
+    def _get_kline_fxmacrodata(
+        self, symbol: str, timeframe: str, limit: int, before_time: Optional[int] = None
+    ) -> List[Dict[str, Any]]:
+        """Fetch daily FX reference-rate bars from FXMacroData."""
+        if timeframe != '1D':
+            return []
+        normalized = normalize_forex_pair_symbol(symbol)
+        if len(normalized) != 6 or not normalized.isalpha():
+            return []
+
+        if before_time:
+            end_dt = datetime.fromtimestamp(int(before_time), tz=timezone.utc)
+        else:
+            end_dt = datetime.now(tz=timezone.utc)
+        start_dt = end_dt - timedelta(days=max(int(limit), 1) * 2)
+
+        params: Dict[str, Any] = {
+            "start_date": start_dt.strftime("%Y-%m-%d"),
+            "end_date": end_dt.strftime("%Y-%m-%d"),
+        }
+        headers: Dict[str, str] = {}
+        if FXMacroDataConfig.API_KEY:
+            headers["X-API-Key"] = FXMacroDataConfig.API_KEY
+
+        url = f"{FXMacroDataConfig.BASE_URL}/forex/{normalized[:3].lower()}/{normalized[3:].lower()}"
+        # The API returns at most 100 rows per request, newest first; page
+        # with offset until enough bars are collected or has_more is false.
+        rows: List[Dict[str, Any]] = []
+        offset = 0
+        for _ in range(100):
+            page_params = dict(params, limit=100, offset=offset)
+            try:
+                # Do not follow redirects, so the X-API-Key header is never
+                # forwarded to another host.
+                response = requests.get(
+                    url,
+                    params=page_params,
+                    headers=headers,
+                    timeout=FXMacroDataConfig.TIMEOUT,
+                    allow_redirects=False,
+                )
+                if 300 <= response.status_code < 400:
+                    logger.debug("FXMacroData forex kline request redirected for %s; not followed", symbol)
+                    return []
+                response.raise_for_status()
+                data = response.json()
+            except requests.exceptions.RequestException as e:
+                logger.debug("FXMacroData forex kline request failed %s: %s", symbol, e)
+                return []
+
+            page = data.get("data") if isinstance(data, dict) else None
+            if not isinstance(page, list):
+                logger.debug("FXMacroData forex kline response missing data list for %s", symbol)
+                return []
+            rows.extend(page)
+            pagination = data.get("pagination") or {}
+            if not page or len(rows) >= limit or not pagination.get("has_more"):
+                break
+            next_offset = pagination.get("next_offset")
+            if next_offset is None:
+                next_offset = offset + len(page)
+            if next_offset <= offset:
+                break
+            offset = next_offset
+
+        klines = []
+        for row in rows:
+            try:
+                dt = datetime.fromisoformat(str(row["date"])).replace(tzinfo=timezone.utc)
+                price = float(row["val"])
+                klines.append({
+                    "time": int(dt.timestamp()),
+                    "open": price,
+                    "high": price,
+                    "low": price,
+                    "close": price,
+                    "volume": 0.0,
+                })
+            except Exception:
+                continue
+
+        klines.sort(key=lambda x: x["time"])
+        if len(klines) > limit:
+            klines = klines[-limit:]
+        logger.debug("FXMacroData forex kline %s %s: %d bars", symbol, timeframe, len(klines))
+        return klines
+
     def _get_kline_twelvedata(
         self, symbol: str, timeframe: str, limit: int, before_time: Optional[int] = None
     ) -> List[Dict[str, Any]]:
diff --git a/backend_api_python/tests/test_fxmacrodata_forex_source.py b/backend_api_python/tests/test_fxmacrodata_forex_source.py
new file mode 100644
index 000000000..ff1447469
--- /dev/null
+++ b/backend_api_python/tests/test_fxmacrodata_forex_source.py
@@ -0,0 +1,116 @@
+from app.data_sources.forex import ForexDataSource
+
+
+def test_fxmacrodata_daily_kline_fetch(monkeypatch):
+    captured = {}
+
+    class FakeResponse:
+        status_code = 200
+
+        @staticmethod
+        def raise_for_status():
+            return None
+
+        @staticmethod
+        def json():
+            return {
+                "data": [
+                    {"date": "2024-01-03", "val": 1.0920},
+                    {"date": "2024-01-01", "val": "1.1038"},
+                ]
+            }
+
+    def fake_get(url, params, headers, timeout, **kwargs):
+        captured["url"] = url
+        captured["params"] = params
+        captured["headers"] = headers
+        captured["timeout"] = timeout
+        return FakeResponse()
+
+    monkeypatch.setenv("FXMACRODATA_API_KEY", "test-key")
+    monkeypatch.setattr("app.data_sources.forex.requests.get", fake_get)
+    source = ForexDataSource()
+
+    rows = source._get_kline_fxmacrodata("EUR/USD", "1D", 5, before_time=1706745600)
+
+    assert rows == [
+        {"time": 1704067200, "open": 1.1038, "high": 1.1038, "low": 1.1038, "close": 1.1038, "volume": 0.0},
+        {"time": 1704240000, "open": 1.092, "high": 1.092, "low": 1.092, "close": 1.092, "volume": 0.0},
+    ]
+    assert captured == {
+        "url": "https://api.fxmacrodata.com/v1/forex/eur/usd",
+        "params": {
+            "start_date": "2024-01-22",
+            "end_date": "2024-02-01",
+            "limit": 100,
+            "offset": 0,
+        },
+        "headers": {"X-API-Key": "test-key"},
+        "timeout": 12,
+    }
+
+
+def test_fxmacrodata_daily_kline_follows_pagination(monkeypatch):
+    pages = {
+        0: {
+            "data": [{"date": "2024-01-03", "val": 1.3}, {"date": "2024-01-02", "val": 1.2}],
+            "pagination": {"has_more": True, "next_offset": 2},
+        },
+        2: {
+            "data": [{"date": "2024-01-01", "val": 1.1}],
+            "pagination": {"has_more": False, "next_offset": None},
+        },
+    }
+    offsets = []
+
+    class FakeResponse:
+        status_code = 200
+
+        def __init__(self, payload):
+            self.payload = payload
+
+        def raise_for_status(self):
+            return None
+
+        def json(self):
+            return self.payload
+
+    def fake_get(url, params, headers, timeout, **kwargs):
+        offsets.append(params["offset"])
+        return FakeResponse(pages[params["offset"]])
+
+    monkeypatch.setattr("app.data_sources.forex.requests.get", fake_get)
+    rows = ForexDataSource()._get_kline_fxmacrodata("EURUSD", "1D", 5, before_time=1704326400)
+
+    assert offsets == [0, 2]
+    assert [row["close"] for row in rows] == [1.1, 1.2, 1.3]
+
+
+def test_fxmacrodata_skips_intraday_timeframes():
+    source = ForexDataSource()
+    assert source._get_kline_fxmacrodata("EURUSD", "1m", 5) == []
+
+
+def test_fxmacrodata_does_not_follow_redirects(monkeypatch):
+    captured = {}
+
+    class FakeResponse:
+        status_code = 302
+
+        @staticmethod
+        def raise_for_status():
+            return None
+
+        @staticmethod
+        def json():
+            return {"data": [{"date": "2024-01-03", "val": 1.0920}]}
+
+    def fake_get(url, params, headers, timeout, **kwargs):
+        captured.update(kwargs)
+        return FakeResponse()
+
+    monkeypatch.setenv("FXMACRODATA_API_KEY", "test-key")
+    monkeypatch.setattr("app.data_sources.forex.requests.get", fake_get)
+
+    assert ForexDataSource()._get_kline_fxmacrodata("EURUSD", "1D", 5) == []
+    assert captured["allow_redirects"] is False