fix(hub): 修复币安行情区 unexpected base 价格精度

normalize_price_tick 对齐 tick 为 10^-n；chart.js 使用整数 base 并在 applyOptions 失败时回退安全 priceFormat。

Co-authored-by: Cursor <cursoragent@cursor.com>

hub_ohlcv_lib.py

@@ -139,6 +139,26 @@ def price_tick_from_market(exchange, exchange_symbol: str) -> Optional[float]:
     return None
 
 
+def normalize_price_tick(tick: Optional[float]) -> Optional[float]:
+    """将 tick 对齐为 10^-n，避免浮点噪声导致前端 lightweight-charts unexpected base。"""
+    if tick is None:
+        return None
+    try:
+        t = float(tick)
+    except (TypeError, ValueError):
+        return None
+    if t <= 0:
+        return None
+    if t >= 1:
+        return t
+    try:
+        exp = int(round(-math.log10(t)))
+    except (ValueError, OverflowError):
+        return None
+    exp = max(0, min(12, exp))
+    return 10 ** (-exp)
+
+
 def _decimals_from_tick(tick: float) -> int:
     if tick >= 1:
         return 0
@@ -413,7 +433,7 @@ def fetch_ohlcv_for_hub(
         if not merged:
             return {"ok": False, "msg": "交易所未返回 K 线"}
 
-        tick = price_tick_from_market(exchange, ex_sym)
+        tick = normalize_price_tick(price_tick_from_market(exchange, ex_sym))
 
         return {
             "ok": True,

manual_trading_hub/static/chart.js

@@ -1009,35 +1009,49 @@
     return Math.max(0, Math.min(12, Math.round(-Math.log10(minMove))));
   }
 
+  const SAFE_PRICE_FORMAT = { type: "price", precision: 4, minMove: 0.0001, base: 10000 };
+
   function tickToPriceFormat(tick) {
-    const minMove =
+    try {
-      tick != null && Number.isFinite(Number(tick)) && Number(tick) > 0 ? Number(tick) : 0.01;
+      if (tick == null || !Number.isFinite(Number(tick)) || Number(tick) <= 0) {
-    const precision = decimalsFromTick(minMove) ?? 2;
+        return { type: "price", precision: 2, minMove: 0.01, base: 100 };
-    const fmt = { type: "price", precision: precision, minMove: minMove };
-    // 避免 minMove 浮点导致 lightweight-charts 报 "unexpected base"
-    if (minMove > 0 && minMove < 1) {
-      const inv = 1 / minMove;
-      if (Number.isFinite(inv) && inv >= 1 && inv <= 1e15) {
-        const base = Math.round(inv);
-        if (base > 0 && Math.abs(inv - base) / Math.max(inv, 1) < 1e-6) {
-          fmt.base = base;
-        }
       }
+      const raw = Number(tick);
+      if (raw >= 1) {
+        return { type: "price", precision: 0, minMove: 1 };
+      }
+      let prec = decimalsFromTick(raw);
+      if (prec == null || prec < 0) prec = 4;
+      prec = Math.min(8, Math.max(0, Math.floor(prec)));
+      const base = Math.pow(10, prec);
+      if (!Number.isFinite(base) || base < 1 || base > 1e12) {
+        return SAFE_PRICE_FORMAT;
+      }
+      return { type: "price", precision: prec, minMove: 1 / base, base: base };
+    } catch (e) {
+      return SAFE_PRICE_FORMAT;
+    }
+  }
+
+  function applyPriceFormatToSeries(series, pf) {
+    if (!series || !series.applyOptions) return;
+    try {
+      series.applyOptions({ priceFormat: pf });
+    } catch (e) {
+      series.applyOptions({ priceFormat: SAFE_PRICE_FORMAT });
     }
-    return fmt;
   }
 
   function applyChartPriceFormat() {
-    const pf = tickToPriceFormat(priceTick);
+    let pf = SAFE_PRICE_FORMAT;
-    if (candleSeries && candleSeries.applyOptions) {
+    try {
-      candleSeries.applyOptions({ priceFormat: pf });
+      pf = tickToPriceFormat(priceTick);
-    }
+    } catch (e) {
-    if (indSeries.ema21 && indSeries.ema21.applyOptions) {
+      pf = SAFE_PRICE_FORMAT;
-      indSeries.ema21.applyOptions({ priceFormat: pf });
-    }
-    if (indSeries.ema55 && indSeries.ema55.applyOptions) {
-      indSeries.ema55.applyOptions({ priceFormat: pf });
     }
+    applyPriceFormatToSeries(candleSeries, pf);
+    applyPriceFormatToSeries(indSeries.ema21, pf);
+    applyPriceFormatToSeries(indSeries.ema55, pf);
     if (chart) {
       chart.applyOptions({
         localization: {
@@ -1288,7 +1302,7 @@
       wickDownColor: "#ff4d6d",
       lastValueVisible: false,
       priceLineVisible: false,
-      priceFormat: tickToPriceFormat(priceTick),
+      priceFormat: SAFE_PRICE_FORMAT,
     };
 
     if (typeof chart.addCandlestickSeries === "function") {
@@ -1515,18 +1529,16 @@
       }
 
       priceTick = data.price_tick;
-      applyChartPriceFormat();
-      lastCandles = data.candles;
-      indexCandles(lastCandles);
       try {
-        candleSeries.setData(lastCandles);
+        applyChartPriceFormat();
-        volumeSeries.setData(buildVolumeData(lastCandles));
+      } catch (fmtErr) {
-      } catch (setErr) {
         priceTick = null;
         applyChartPriceFormat();
-        candleSeries.setData(lastCandles);
-        volumeSeries.setData(buildVolumeData(lastCandles));
       }
+      lastCandles = data.candles;
+      indexCandles(lastCandles);
+      candleSeries.setData(lastCandles);
+      volumeSeries.setData(buildVolumeData(lastCandles));
       applyChartRightGap();
       if (resetView) {
         lastViewKey = vKey;
@@ -1538,7 +1550,11 @@
       updateVisibleRangeMarkers();
       syncPosContextForView(exKey, sym);
       showLatestOhlcv();
-      updateIndicators();
+      try {
+        updateIndicators();
+      } catch (indErr) {
+        /* 指标序列 priceFormat 异常时不阻断主图 */
+      }
       scheduleChartResize();
 
       const limit = data.limit || lastCandles.length;

tests/test_hub_ohlcv_lib.py

@@ -7,6 +7,7 @@ from hub_ohlcv_lib import (
     aggregate_ohlcv_bars,
     bars_spacing_matches_timeframe,
     fetch_ohlcv_for_hub,
+    normalize_price_tick,
 )
 
 
@@ -30,6 +31,11 @@ class _FakeExchange:
 
 
 class TestHubOhlcvLib(unittest.TestCase):
+    def test_normalize_price_tick_snaps_powers_of_ten(self):
+        self.assertAlmostEqual(normalize_price_tick(0.00001), 0.00001)
+        self.assertAlmostEqual(normalize_price_tick(0.001), 0.001)
+        self.assertIsNone(normalize_price_tick(0))
+
     def test_price_tick_from_decimal_precision(self):
         class _Ex:
             markets = {"BTC/USDT:USDT": {"precision": {"price": 2}, "info": {}, "limits": {}}}