Warn on buy/sell when spread exceeds 0.50 USD.

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

desktop/gold_order_app.py

@@ -75,6 +75,7 @@ COLOR_TEXT = "#f0f0f5"
 COLOR_ACCENT = "#4cc2ff"
 BE_MIN_MOVE_USD = 3.0  # 价格向有利方向走出该美金距离才可保本（非账户浮盈）
 BE_OFFSET_USD = 1.0    # 保本止损 = 开仓价 ± 1$
+SPREAD_WARN_USD = 0.50  # 点差超过该美金时，买卖按钮区提示（不禁开）
 
 
 def simpledialog_ask_server(parent: tk.Misc) -> str:
@@ -715,6 +716,7 @@ class OrderApp(tk.Tk):
         self._pos_sig = None
         self._pos_profit_labels: dict = {}
         self._metric_values: dict = {}
+        self._last_spread: float = 0.0
         self._build_ui()
         self.after(200, self._try_connect_and_refresh)
         self.after(3000, self._hub_heartbeat)
@@ -987,6 +989,7 @@ class OrderApp(tk.Tk):
             root,
             text=(
                 f"最多同时 {MAX_OPEN_POSITIONS} 笔 · 同向≤{MAX_SIDE_LOTS:.2f} 手 · "
+                f"点差>{SPREAD_WARN_USD:.2f} 买卖提示 · "
                 "亏≥5%或盈≥10%禁止开仓 · 保本：有利方向>3$ 后止损到开仓价±1$"
             ),
             bg=COLOR_BG,
@@ -1110,7 +1113,7 @@ class OrderApp(tk.Tk):
             )
 
     def _sync_open_buttons(self, symbol: str) -> None:
-        """满仓 / 同向上限 / 日内达标 → 买卖置灰，并显示禁止开仓标识。"""
+        """满仓 / 同向上限 / 日内达标 → 买卖置灰；点差过大时买卖区提示（不禁开）。"""
         if not hasattr(self, "btn_buy"):
             return
         try:
@@ -1135,6 +1138,7 @@ class OrderApp(tk.Tk):
         self._set_trade_btn(self.btn_buy, can_buy, COLOR_BUY)
         self._set_trade_btn(self.btn_sell, can_sell, COLOR_SELL)
 
+        spread_wide = self._last_spread > SPREAD_WARN_USD + 1e-9
         pct = rate * 100.0
         if lock_kind == "loss":
             badge = f"亏损达标 {pct:.2f}%  ·  禁止开仓"
@@ -1151,14 +1155,32 @@ class OrderApp(tk.Tk):
             banner = f"持仓已满 {MAX_OPEN_POSITIONS} 笔，平仓后再开"
             color = COLOR_WARN
             bg = "#3a3220"
+        elif spread_wide:
+            badge = f"点差偏大 {self._last_spread:.2f}$"
+            banner = (
+                f"⚠ 点差过大 {self._last_spread:.2f}$（阈值 {SPREAD_WARN_USD:.2f}）｜"
+                "建议暂缓开仓"
+            )
+            color = COLOR_WARN
+            bg = "#3a3220"
         else:
             badge = ""
             banner = ""
             color = COLOR_NEUTRAL
-            bg = "#1e1e1e"
+            bg = COLOR_BG
 
-        self.lbl_day_lock.configure(text=badge, fg=color, bg=bg if badge else "#1e1e1e")
-        self.lbl_open_block.configure(text=banner, fg=color, bg=bg if banner else "#1e1e1e")
+        # 买卖按钮文案：可开且点差大时直接写在按钮上
+        if can_buy:
+            self.btn_buy.configure(text="买入 ⚠点差大" if spread_wide else "买入")
+        else:
+            self.btn_buy.configure(text="买入")
+        if can_sell:
+            self.btn_sell.configure(text="卖出 ⚠点差大" if spread_wide else "卖出")
+        else:
+            self.btn_sell.configure(text="卖出")
+
+        self.lbl_day_lock.configure(text=badge, fg=color, bg=bg if badge else COLOR_CARD)
+        self.lbl_open_block.configure(text=banner, fg=color, bg=bg if banner else COLOR_BG)
 
     def _toggle_ticket_select(self, ticket: int) -> None:
         if ticket in self._selected_tickets_set:
@@ -1405,6 +1427,7 @@ class OrderApp(tk.Tk):
                 market_open = False
 
             spread = ask - bid if ask and bid else 0.0
+            self._last_spread = spread
             try:
                 buy, sell, profit = self.bridge.exposure(symbol)
             except TradeError:
@@ -1445,11 +1468,14 @@ class OrderApp(tk.Tk):
                 self.lbl_quote.configure(text=f"Bid {bid:.{digits}f}    Ask {ask:.{digits}f}")
             else:
                 self.lbl_quote.configure(text="Bid --    Ask --")
+            spread_wide = spread > SPREAD_WARN_USD + 1e-9
             self.lbl_info.configure(
                 text=(
-                    f"点差 {spread:.{digits}f}   ATR {atr_txt}   "
+                    f"点差 {spread:.{digits}f}"
+                    f"{' ⚠偏大' if spread_wide else ''}   ATR {atr_txt}   "
                     f"SL${sl_txt}   TP${tp_txt}   持仓 {pos}   浮盈 {profit:.2f}"
-                )
+                ),
+                fg=COLOR_WARN if spread_wide else COLOR_MUTED,
             )
             try:
                 day = self.bridge.day_ohlc(symbol)