Fix historical candle chart

server.py

@@ -296,25 +296,39 @@ def _resolve_symbol(ticker: str, market_type: str) -> str:
     return ticker
 
 
+def _to_yahoo_ticker(ticker: str) -> str:
+    """Convert various ticker formats to Yahoo Finance format."""
+    if ".JK" in ticker or ".JK" in ticker.upper():
+        return ticker.replace(".jk", ".JK").replace(".Jk", ".JK")
+    if ticker.startswith("IDX:"):
+        return ticker.replace("IDX:", "") + ".JK"
+    if ":" in ticker:
+        return ticker.split(":", 1)[1]
+    return ticker
+
+
 def _fetch_candles(
     ticker: str,
     resolution: str = "D",
     count: int = 30,
 ) -> list[dict[str, Any]]:
+    # Try TradingView chart API first
     sym = _resolve_symbol(ticker, "stocks")
     to_ts = int(time.time())
     resolution_seconds = {"1": 60, "5": 300, "15": 900, "30": 1800, "60": 3600,
                           "240": 14400, "D": 86400, "W": 604800, "M": 2592000}
     from_ts = to_ts - (count * resolution_seconds.get(resolution, 86400))
 
-    url = "https://chart-data.tradingview.com/history"
+    tv_urls = [
+        "https://chart-data.tradingview.com/history",
+        "https://scanner.tradingview.com/history",
+    ]
+    for url in tv_urls:
+        try:
             params = {"symbol": sym, "resolution": resolution, "from": from_ts, "to": to_ts}
-    resp = requests.get(url, headers=TV_CHART_HEADERS, params=params, timeout=15)
+            resp = requests.get(url, headers=TV_CHART_HEADERS, params=params, timeout=10)
             data = resp.json()
-
-    if data.get("s") != "ok":
-        return []
-
+            if data.get("s") == "ok" and len(data.get("t", [])) > 0:
                 candles = []
                 for i in range(len(data["t"])):
                     candles.append({
@@ -326,6 +340,56 @@ def _fetch_candles(
                         "volume": data["v"][i],
                     })
                 return candles
+        except requests.RequestException:
+            continue
+
+    # Fallback: Yahoo Finance API
+    try:
+        yahoo_sym = _to_yahoo_ticker(ticker)
+        interval_map = {"1": "1m", "5": "5m", "15": "15m", "30": "30m",
+                        "60": "60m", "240": "4h", "D": "1d", "W": "1wk", "M": "1mo"}
+        interval = interval_map.get(resolution, "1d")
+        range_map = {30: "1mo", 60: "3mo", 120: "6mo", 250: "1y", 500: "2y"}
+        y_range = "1mo"
+        for cnt, r in sorted(range_map.items()):
+            if count <= cnt:
+                y_range = r
+                break
+        else:
+            y_range = "5y"
+
+        url = f"https://query1.finance.yahoo.com/v8/finance/chart/{yahoo_sym}"
+        params = {"interval": interval, "range": y_range}
+        headers = {"User-Agent": TV_CHART_HEADERS["User-Agent"]}
+        resp = requests.get(url, headers=headers, params=params, timeout=15)
+        data = resp.json()
+
+        result = data.get("chart", {}).get("result", [None])[0]
+        if not result:
+            result = data.get("chart", {}).get("result", [None])[0]
+        if result:
+            timestamps = result.get("timestamp", [])
+            quotes = result.get("indicators", {}).get("quote", [None])[0]
+            if timestamps and quotes:
+                opens = quotes.get("open", [])
+                highs = quotes.get("high", [])
+                lows = quotes.get("low", [])
+                closes = quotes.get("close", [])
+                volumes = quotes.get("volume", [])
+                candles = []
+                for i in range(len(timestamps)):
+                    o, h, l, c, v = opens[i], highs[i], lows[i], closes[i], volumes[i]
+                    if None in (o, h, l, c, v):
+                        continue
+                    candles.append({
+                        "time": timestamps[i],
+                        "open": o, "high": h, "low": l, "close": c, "volume": v,
+                    })
+                return candles[-count:]
+    except requests.RequestException:
+        pass
+
+    return []
 
 
 def _detect_candle_patterns(candles: list[dict[str, Any]]) -> list[str]: