diff --git a/lib/common/static/hedge_plan.js b/lib/common/static/hedge_plan.js
index db9700e..2f5d8a6 100644
--- a/lib/common/static/hedge_plan.js
+++ b/lib/common/static/hedge_plan.js
@@ -177,6 +177,7 @@
     const acctLabel = d.account_label || "合约账户";
     const tag = $("hp-perp-acct-tag");
     if (tag) tag.textContent = acctLabel;
+    const amtPrec = d.amount_precision != null ? Number(d.amount_precision) : 4;
     const q = $("hp-perp-quote");
     if (q) {
       q.innerHTML =
@@ -186,7 +187,7 @@
         acctLabel +
         "可用 <strong>" +
         fmt(d.available_usdt, 2) +
-        "</strong> U<br/>标记 <strong>" +
+        "</strong> USDT<br/>标记 <strong>" +
         fmt(d.mark, 2) +
         "</strong> · 最新 " +
         fmt(d.last, 2) +
@@ -195,7 +196,15 @@
         " · 买一 " +
         fmt(d.bid, 2) +
         " · 面值 " +
-        fmt(d.contract_size, 4);
+        fmt(d.contract_size, 4) +
+        " · 张精度 " +
+        amtPrec +
+        " 位";
+    }
+    const contractsInput = $("hp-contracts");
+    if (contractsInput) {
+      const step = amtPrec <= 0 ? "1" : String(Math.pow(10, -amtPrec));
+      contractsInput.step = step;
     }
     const sz = $("hp-sizing-line");
     if (sz) {
@@ -206,25 +215,73 @@
           acctLabel +
           "):保证金 " +
           fmt(s.margin_capital, 2) +
-          "U × " +
+          " USDT × " +
           s.leverage +
           "x → 名义 " +
           fmt(s.notional_value, 2) +
-          "U · 建议约 " +
-          fmt(d.suggest_contracts, 4) +
-          " 张";
+          " USDT · 建议 " +
+          fmt(d.suggest_contracts, amtPrec) +
+          " 合约张(已按交易所精度)";
       } else {
         sz.textContent = "非全仓或不具备保证金数据时仅手动填张数;永期开仓需全仓.";
       }
     }
     const entry = $("hp-entry");
     if (entry && d.entry_ref && !entry.value) entry.value = d.entry_ref;
-    const contracts = $("hp-contracts");
-    if (contracts && d.suggest_contracts != null && !contracts.value) {
-      contracts.value = d.suggest_contracts;
+    if (contractsInput && d.suggest_contracts != null && !contractsInput.value) {
+      contractsInput.value = fmt(d.suggest_contracts, amtPrec);
     }
     const label = $("hp-opt-type-label");
     if (label) label.textContent = d.suggested_opt_type === "C" ? "Call" : "Put";
+    updatePerpPnlHint();
+  }
+
+  function updatePerpPnlHint() {
+    const el = $("hp-perp-pnl-line");
+    if (!el) return;
+    const entry = Number(($("hp-entry") && $("hp-entry").value) || NaN);
+    const tp = Number(($("hp-tp") && $("hp-tp").value) || NaN);
+    const sl = Number(($("hp-sl") && $("hp-sl").value) || NaN);
+    const contracts = Number(($("hp-contracts") && $("hp-contracts").value) || NaN);
+    const cs = Number((state.market && state.market.contract_size) || 0.01);
+    const dir = (($("hp-direction") && $("hp-direction").value) || "long").toLowerCase();
+    if (!(entry > 0) || !(contracts > 0) || !(cs > 0)) {
+      el.textContent = "填写开仓价与张数后,输入止盈/止损可看永续盈亏金额(USDT)";
+      return;
+    }
+    function pnlAt(exitPx) {
+      const coins = contracts * cs;
+      if (dir === "short") return (entry - exitPx) * coins;
+      return (exitPx - entry) * coins;
+    }
+    const parts = [];
+    if (tp > 0) {
+      const p = pnlAt(tp);
+      parts.push(
+        "止盈预期 <strong class=\"" +
+          (p >= 0 ? "hp-pnl-pos" : "hp-pnl-neg") +
+          "\">" +
+          (p >= 0 ? "+" : "") +
+          fmt(p, 2) +
+          " USDT</strong>"
+      );
+    } else {
+      parts.push("止盈预期 —");
+    }
+    if (sl > 0) {
+      const p = pnlAt(sl);
+      parts.push(
+        "止损预期 <strong class=\"" +
+          (p >= 0 ? "hp-pnl-pos" : "hp-pnl-neg") +
+          "\">" +
+          (p >= 0 ? "+" : "") +
+          fmt(p, 2) +
+          " USDT</strong>"
+      );
+    } else {
+      parts.push("止损预期 —");
+    }
+    el.innerHTML = parts.join(" · ");
   }
 
   function fillExpSelect(sel, chain) {
@@ -632,6 +689,10 @@
         });
       });
     }
+    ["hp-entry", "hp-tp", "hp-sl", "hp-contracts"].forEach(function (id) {
+      const el = $(id);
+      if (el) el.addEventListener("input", updatePerpPnlHint);
+    });
     if ($("hp-refresh"))
       $("hp-refresh").addEventListener("click", function () {
         void refreshAll();
diff --git a/lib/common/static/instance_theme.css b/lib/common/static/instance_theme.css
index 76acfb7..41b61ba 100644
--- a/lib/common/static/instance_theme.css
+++ b/lib/common/static/instance_theme.css
@@ -3212,6 +3212,28 @@ html[data-theme="light"] .opt-be-dist-down {
   font-weight: 500;
   margin-left: 4px;
 }
+.hedge-plan-page-wrap .hp-unit {
+  font-size: 0.66rem;
+  color: #8892b0;
+  font-weight: 500;
+  margin-right: 2px;
+}
+.hedge-plan-page-wrap .hp-unit-hint {
+  font-size: 0.68rem;
+  margin: 2px 0 6px;
+  line-height: 1.4;
+}
+.hedge-plan-page-wrap #hp-perp-pnl-line {
+  font-size: 0.74rem;
+  margin: 4px 0 6px;
+  line-height: 1.45;
+}
+.hedge-plan-page-wrap .hp-pnl-pos {
+  color: #7ee787;
+}
+.hedge-plan-page-wrap .hp-pnl-neg {
+  color: #ff8a8a;
+}
 .hedge-plan-page-wrap .form-row label,
 .hedge-plan-page-wrap .form-row select,
 .hedge-plan-page-wrap .form-row input,
diff --git a/lib/hedge_plan/hedge_plan_calc_lib.py b/lib/hedge_plan/hedge_plan_calc_lib.py
index 1507482..d200785 100644
--- a/lib/hedge_plan/hedge_plan_calc_lib.py
+++ b/lib/hedge_plan/hedge_plan_calc_lib.py
@@ -69,6 +69,23 @@ def suggest_contracts_from_notional(
     return float(notional) / (float(entry) * float(contract_size))
 
 
+def floor_contracts_to_precision(contracts: float, decimals: int) -> float:
+    """按交易所张数精度向下取整,避免建议张数超过可用保证金."""
+    import math
+
+    raw = float(contracts or 0.0)
+    if raw <= 0:
+        return 0.0
+    try:
+        d = int(decimals)
+    except (TypeError, ValueError):
+        d = 0
+    if d <= 0:
+        return float(math.floor(raw + 1e-12))
+    scale = 10**d
+    return math.floor(raw * scale + 1e-12) / scale
+
+
 def build_perp_options_preview(
     *,
     direction: str,
diff --git a/lib/hedge_plan/hedge_plan_register.py b/lib/hedge_plan/hedge_plan_register.py
index 548e3c6..f49cad9 100644
--- a/lib/hedge_plan/hedge_plan_register.py
+++ b/lib/hedge_plan/hedge_plan_register.py
@@ -10,10 +10,12 @@ from jinja2 import ChoiceLoader, FileSystemLoader
 from lib.hedge_plan.hedge_plan_calc_lib import (
     build_options_options_preview,
     build_perp_options_preview,
+    floor_contracts_to_precision,
     gate_status,
     option_premium_total,
     suggest_contracts_from_notional,
 )
+from lib.hub.hub_calculator_market_lib import amount_decimals_from_exchange
 from lib.trade.position_sizing_lib import (
     compute_full_margin_sizing,
     load_position_sizing_mode,
@@ -305,6 +307,11 @@ def _fetch_perp_market(cfg: dict[str, Any], base: str) -> tuple[dict[str, Any],
     entry = float(mark or last or 0)
     sizing = None
     suggest_contracts = None
+    amount_precision = 4
+    try:
+        amount_precision = int(amount_decimals_from_exchange(ex, sym))
+    except Exception:
+        amount_precision = 4
     if available is not None and entry > 0:
         sizing, _serr = compute_full_margin_sizing(
             symbol=sym,
@@ -316,11 +323,20 @@ def _fetch_perp_market(cfg: dict[str, Any], base: str) -> tuple[dict[str, Any],
             funds_decimals=int(cfg.get("funds_decimals") or 2),
         )
         if sizing:
-            suggest_contracts = suggest_contracts_from_notional(
+            raw_contracts = suggest_contracts_from_notional(
                 notional=float(sizing["notional_value"]),
                 entry=entry,
                 contract_size=cs,
             )
+            # 优先走交易所 amount_to_precision;失败则按精度位数向下取整
+            suggest_contracts = None
+            try:
+                precise = float(ex.amount_to_precision(sym, raw_contracts))
+                if precise > raw_contracts + 1e-12:
+                    precise = floor_contracts_to_precision(raw_contracts, amount_precision)
+                suggest_contracts = precise
+            except Exception:
+                suggest_contracts = floor_contracts_to_precision(raw_contracts, amount_precision)
 
     return {
         "exchange_symbol": sym,
@@ -331,7 +347,11 @@ def _fetch_perp_market(cfg: dict[str, Any], base: str) -> tuple[dict[str, Any],
         "contract_size": cs,
         "available_usdt": available,
         "full_margin_sizing": sizing,
-        "suggest_contracts": round(suggest_contracts, 6) if suggest_contracts is not None else None,
+        "suggest_contracts": suggest_contracts,
+        "amount_precision": amount_precision,
+        "unit_quote": "USDT",
+        "unit_contracts": "合约张",
+        "unit_note": "价格单位 USDT;张数=交易所永续合约张(与下单精度一致);名义≈张数×面值×价格",
         "entry_ref": entry or None,
     }, None
 
diff --git a/lib/hedge_plan/templates/hedge_plan_panel.html b/lib/hedge_plan/templates/hedge_plan_panel.html
index 3bab432..732d1b7 100644
--- a/lib/hedge_plan/templates/hedge_plan_panel.html
+++ b/lib/hedge_plan/templates/hedge_plan_panel.html
@@ -39,12 +39,14 @@
           </select>
         </div>
         <div id="hp-perp-quote" class="muted hp-quote-line">加载中…</div>
+        <p class="muted hp-unit-hint">单位说明:价格=USDT · 张数=交易所<strong>永续合约张</strong>(精度与 OKX 下单一致) · 盈亏=USDT</p>
         <div class="form-row" style="flex-wrap:wrap">
-          <label>开仓价 <input type="number" step="any" id="hp-entry" /></label>
-          <label>止盈 <input type="number" step="any" id="hp-tp" /></label>
-          <label>止损 <input type="number" step="any" id="hp-sl" /></label>
-          <label>张数 <input type="number" step="any" id="hp-contracts" /></label>
+          <label>开仓价 <span class="hp-unit">USDT</span> <input type="number" step="any" id="hp-entry" /></label>
+          <label>止盈 <span class="hp-unit">USDT</span> <input type="number" step="any" id="hp-tp" /></label>
+          <label>止损 <span class="hp-unit">USDT</span> <input type="number" step="any" id="hp-sl" /></label>
+          <label>张数 <span class="hp-unit">合约张</span> <input type="number" step="any" id="hp-contracts" /></label>
         </div>
+        <p class="muted" id="hp-perp-pnl-line"></p>
         <p class="muted" id="hp-sizing-line"></p>
       </div>
       <div class="card hp-opt-card">
@@ -75,9 +77,10 @@
         </div>
         <div class="form-row hp-pick-row">
           <label>已选 <code id="hp-sel-inst">—</code></label>
-          <label>张数 <input type="number" step="1" min="1" id="hp-sheets" value="1" /></label>
+          <label>张数 <span class="hp-unit">期权张</span> <input type="number" step="1" min="1" id="hp-sheets" value="1" /></label>
           <span class="muted" id="hp-premium-line"></span>
         </div>
+        <p class="muted hp-unit-hint">单位说明:权利金结算币=<strong>USDC</strong> · 张数=期权张(整张) · 卖一/买一=价格/张</p>
         <div id="hp-opt-bal-line" class="muted hp-quote-line hp-opt-bal-line"></div>
       </div>
     </div>
@@ -192,4 +195,4 @@
     </div>
   </div>
 </div>
-<script src="/static/hedge_plan.js?v=6"></script>
+<script src="/static/hedge_plan.js?v=7"></script>
diff --git a/lib/instance/templates/embed_shell.html b/lib/instance/templates/embed_shell.html
index cf9921b..60fcc9a 100644
--- a/lib/instance/templates/embed_shell.html
+++ b/lib/instance/templates/embed_shell.html
@@ -7,7 +7,7 @@
     <link rel="stylesheet" href="/static/instance_theme_early.css?v=4">
     <link rel="stylesheet" href="/static/account_risk_badge.css?v=4">
     <link rel="stylesheet" href="/static/instance_page.css?v=6">
-    <link rel="stylesheet" href="/static/instance_theme.css?v=85">
+    <link rel="stylesheet" href="/static/instance_theme.css?v=86">
     <script src="/static/account_risk_badge.js?v=4"></script>
     <meta name="theme-color" content="#0b0d14">
     <title>{{ exchange_display }} · 加密货币 | 交易监控复盘系统</title>
diff --git a/lib/instance/templates/index.html b/lib/instance/templates/index.html
index 53d512b..d91d18a 100644
--- a/lib/instance/templates/index.html
+++ b/lib/instance/templates/index.html
@@ -17,7 +17,7 @@
     <link rel="manifest" href="/static/icons/manifest.webmanifest">
     <title>{{ exchange_display }} · 加密货币 | 交易监控复盘系统</title>
     <link rel="stylesheet" href="/static/instance_page.css?v=3">
-    <link rel="stylesheet" href="/static/instance_theme.css?v=85">
+    <link rel="stylesheet" href="/static/instance_theme.css?v=86">
 
 </head>
 <body
diff --git a/tests/test_hedge_plan_calc.py b/tests/test_hedge_plan_calc.py
index a895711..0cab660 100644
--- a/tests/test_hedge_plan_calc.py
+++ b/tests/test_hedge_plan_calc.py
@@ -4,6 +4,7 @@ import unittest
 from lib.hedge_plan.hedge_plan_calc_lib import (
     build_options_options_preview,
     build_perp_options_preview,
+    floor_contracts_to_precision,
     gate_status,
     option_expiry_pnl,
     option_premium_total,
@@ -81,6 +82,11 @@ class TestHedgePlanCalc(unittest.TestCase):
             10,
         )
 
+    def test_floor_contracts_to_precision(self):
+        self.assertEqual(floor_contracts_to_precision(4.569713, 4), 4.5697)
+        self.assertEqual(floor_contracts_to_precision(4.569713, 0), 4.0)
+        self.assertEqual(floor_contracts_to_precision(0, 4), 0.0)
+
 
 if __name__ == "__main__":
     unittest.main()