diff --git a/lib/common/static/instance_theme.css b/lib/common/static/instance_theme.css
index 502e56b..cb92e6a 100644
--- a/lib/common/static/instance_theme.css
+++ b/lib/common/static/instance_theme.css
@@ -2658,6 +2658,40 @@ html[data-theme="light"] .opt-be-dist-down {
 .options-page-wrap .options-order-grid .v {
   font-size: 0.8rem;
 }
+.options-estimate-row {
+  display: flex;
+  flex-wrap: wrap;
+  align-items: center;
+  gap: 8px 12px;
+  margin: 8px 0 10px;
+  padding: 8px 10px;
+  border-radius: 8px;
+  background: rgba(255, 255, 255, 0.03);
+  border: 1px dashed rgba(255, 255, 255, 0.08);
+  font-size: 0.74rem;
+}
+.options-estimate-row .opt-est-label {
+  color: #8892b0;
+}
+.options-estimate-row .opt-target-idx {
+  width: 120px;
+  font-size: 0.74rem;
+  padding: 3px 6px;
+}
+.options-estimate-row .k {
+  color: #8892b0;
+}
+.options-estimate-row .v {
+  font-size: 0.82rem;
+  font-weight: 600;
+}
+.options-estimate-row .opt-est-note {
+  font-size: 0.66rem;
+}
+html[data-theme="light"] .options-estimate-row {
+  background: rgba(0, 0, 0, 0.02);
+  border-color: rgba(0, 0, 0, 0.08);
+}
 .options-hint {
   font-size: 0.75rem;
   margin-bottom: 6px;
diff --git a/lib/common/static/options_panel.js b/lib/common/static/options_panel.js
index 36a23e1..4f4bbbe 100644
--- a/lib/common/static/options_panel.js
+++ b/lib/common/static/options_panel.js
@@ -13,6 +13,7 @@
     optType: "C",
     chain: panelCache.chain || null,
     selectedInst: null,
+    orderQuote: null,
   };
 
   function fmt(v, d) {
@@ -72,7 +73,7 @@
     const tr = document.createElement("tr");
     tr.className = "opt-order-inline-row";
     const td = document.createElement("td");
-    td.colSpan = 6;
+    td.colSpan = 8;
     td.appendChild(panel);
     tr.appendChild(td);
     row.after(tr);
@@ -158,6 +159,60 @@
     return price + "/" + size;
   }
 
+  function pnlCls(v) {
+    if (v === null || v === undefined || Number.isNaN(Number(v))) return "";
+    const n = Number(v);
+    if (n > 0) return "pos-pnl-profit";
+    if (n < 0) return "pos-pnl-loss";
+    return "";
+  }
+
+  function estimateExpiryProfit(optType, strike, targetIdx, entryPx, ethAmount) {
+    if (strike == null || targetIdx == null || entryPx == null || ethAmount == null) return null;
+    const amt = Number(ethAmount);
+    const entry = Number(entryPx);
+    const tgt = Number(targetIdx);
+    const k = Number(strike);
+    if (!Number.isFinite(amt) || !Number.isFinite(entry) || !Number.isFinite(tgt) || !Number.isFinite(k) || amt <= 0) {
+      return null;
+    }
+    const o = (optType || "").toUpperCase();
+    let intrinsic = 0;
+    if (o === "C") intrinsic = Math.max(0, tgt - k);
+    else if (o === "P") intrinsic = Math.max(0, k - tgt);
+    else return null;
+    return Math.round((intrinsic - entry) * amt * 10000) / 10000;
+  }
+
+  function updateEstimatedProfit() {
+    const el = document.getElementById("opt-est-profit");
+    const targetEl = document.getElementById("opt-target-idx");
+    if (!el || !targetEl) return;
+    const q = state.orderQuote;
+    if (!q || !q.ok) {
+      el.textContent = "—";
+      el.className = "v";
+      return;
+    }
+    const targetRaw = targetEl.value;
+    if (targetRaw === "" || targetRaw == null) {
+      el.textContent = "—";
+      el.className = "v";
+      return;
+    }
+    const sz = q.sizing || {};
+    const ethAmount = sz.eth_amount;
+    const profit = estimateExpiryProfit(q.opt_type, q.strike, Number(targetRaw), q.ask, ethAmount);
+    if (profit == null || Number.isNaN(profit)) {
+      el.textContent = "—";
+      el.className = "v";
+      return;
+    }
+    const sign = profit > 0 ? "+" : "";
+    el.textContent = sign + profit.toFixed(4) + " USDC";
+    el.className = "v " + pnlCls(profit);
+  }
+
   function fmtDist(v) {
     if (v === null || v === undefined || Number.isNaN(Number(v))) return "—";
     const n = Number(v);
@@ -211,8 +266,7 @@
         "<td>" + (c.expiry_be_px != null ? fmt(c.expiry_be_px, 0) : "—") + "</td>" +
         '<td class="' + distBeClass(c.dist_expiry_be) + '">' + fmtDist(c.dist_expiry_be) + "</td>" +
         '<td class="opt-row-actions">' +
-        '<button type="button" class="btn-secondary opt-pick-btn" data-inst="' + c.inst_id + '">选择</button> ' +
-        '<button type="button" class="btn-primary opt-buy-btn" data-inst="' + c.inst_id + '">买入</button>' +
+        '<button type="button" class="btn-secondary opt-pick-btn" data-inst="' + c.inst_id + '">选择</button>' +
         "</td>";
       tbody.appendChild(tr);
       if (c.inst_id === prevSelected) stillVisible = true;
@@ -222,12 +276,6 @@
         selectContract(btn.getAttribute("data-inst"), btn);
       });
     });
-    tbody.querySelectorAll(".opt-buy-btn").forEach(function (btn) {
-      btn.addEventListener("click", async function () {
-        await selectContract(btn.getAttribute("data-inst"), null);
-        await openPosition();
-      });
-    });
     if (stillVisible && prevSelected) {
       selectContract(prevSelected, null, true);
     } else {
@@ -236,6 +284,7 @@
   }
 
   function fillOrderPanel(d) {
+    state.orderQuote = d && d.ok ? d : null;
     const sz = d.sizing || {};
     document.getElementById("opt-order-inst").textContent = d.inst_id || state.selectedInst || "";
     document.getElementById("opt-order-ask").textContent = fmtPxSz(d.ask, d.ask_sz);
@@ -264,6 +313,7 @@
       msgEl.textContent = "";
       msgEl.classList.remove("opt-error");
     }
+    updateEstimatedProfit();
   }
 
   async function selectContract(instId, pickBtn, silent) {
@@ -553,12 +603,19 @@
     });
   });
 
-  ["opt-sheets-amount", "opt-eth-amount"].forEach(function (id) {
+  ["opt-sheets-amount", "opt-eth-amount", "opt-target-idx"].forEach(function (id) {
     const el = document.getElementById(id);
     if (!el) return;
     el.addEventListener("change", function () {
+      if (id === "opt-target-idx") {
+        updateEstimatedProfit();
+        return;
+      }
       if (state.selectedInst) selectContract(state.selectedInst, null, true);
     });
+    if (id === "opt-target-idx") {
+      el.addEventListener("input", updateEstimatedProfit);
+    }
   });
 
   bootOptionsPanel();
diff --git a/lib/options/options_pricing_lib.py b/lib/options/options_pricing_lib.py
index 24a8028..5be60da 100644
--- a/lib/options/options_pricing_lib.py
+++ b/lib/options/options_pricing_lib.py
@@ -234,3 +234,26 @@ def format_options_breakeven_line(
     if idx_px is not None and parts:
         return " ".join(parts) + f"（指数{idx_px:.0f}）"
     return " ".join(parts)
+
+
+def estimate_expiry_profit_at_index(
+    *,
+    opt_type: str,
+    strike: float | None,
+    target_idx: float | None,
+    entry_px: float | None,
+    eth_amount: float | None,
+) -> float | None:
+    """到期测算：目标指数价下按内在价值减权利金（每 1 币报价 × 币量）。"""
+    if strike is None or target_idx is None or entry_px is None or eth_amount is None:
+        return None
+    if eth_amount <= 0:
+        return None
+    o = (opt_type or "").upper()
+    if o == "C":
+        intrinsic = max(0.0, float(target_idx) - float(strike))
+    elif o == "P":
+        intrinsic = max(0.0, float(strike) - float(target_idx))
+    else:
+        return None
+    return round((intrinsic - float(entry_px)) * float(eth_amount), 4)
diff --git a/lib/options/templates/options_panel.html b/lib/options/templates/options_panel.html
index ea4ba7d..e61ceaf 100644
--- a/lib/options/templates/options_panel.html
+++ b/lib/options/templates/options_panel.html
@@ -49,6 +49,13 @@
                         <div><span class="k">到期平衡</span><span id="opt-order-expiry-be" class="v">—</span></div>
                         <div><span class="k">距平衡</span><span id="opt-order-dist-be" class="v">—</span></div>
                     </div>
+                    <div class="options-estimate-row">
+                        <label class="opt-est-label" for="opt-target-idx">目标位（指数）</label>
+                        <input type="number" id="opt-target-idx" class="opt-target-idx" step="0.1" min="0" placeholder="到期时指数价">
+                        <span class="k">预计盈利</span>
+                        <span id="opt-est-profit" class="v">—</span>
+                        <span class="muted opt-est-note">到期测算，仅供参考</span>
+                    </div>
                     <div class="form-row options-order-mode-row">
                         <label><input type="radio" name="opt-size-mode" value="sheets" checked> 指定张数</label>
                         <input type="number" id="opt-sheets-amount" min="1" step="1" value="1" placeholder="张数">
diff --git a/tests/test_options_pricing.py b/tests/test_options_pricing.py
index f3e509e..54cd604 100644
--- a/tests/test_options_pricing.py
+++ b/tests/test_options_pricing.py
@@ -67,6 +67,21 @@ def test_option_moneyness():
     assert option_moneyness_label("otm") == "虚值"
 
 
+def test_estimate_expiry_profit_at_index():
+    from lib.options.options_pricing_lib import estimate_expiry_profit_at_index
+
+    # Call 1780, ask 12.2, 0.01 ETH, target 1793 -> (13-12.2)*0.01 = 0.008
+    p = estimate_expiry_profit_at_index(
+        opt_type="C", strike=1780, target_idx=1793, entry_px=12.2, eth_amount=0.01
+    )
+    assert p == 0.008
+    # OTM call loses premium
+    p2 = estimate_expiry_profit_at_index(
+        opt_type="C", strike=1780, target_idx=1770, entry_px=12.2, eth_amount=0.01
+    )
+    assert p2 == round(-12.2 * 0.01, 4)
+
+
 def test_format_quote_liquidity():
     from lib.options.options_pricing_lib import format_quote_liquidity