diff --git a/CHANGELOG.md b/CHANGELOG.md
index ad0a8a66..81e2276e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -25,6 +25,12 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
   always survives in a `title` tooltip; applied across Overview / Strategies /
   Orders / PnL / Logs and the legacy single-engine dashboard (ui-ux-overhaul
   leaf 02).
+- **Overview: positions by strategy + summary strip.** Positions now group by
+  strategy by default (dropping the redundant Strategy column from both header
+  and rows in that view), the group-by and KPI-level choices persist across
+  reloads (`localStorage`), and a summary strip above the KPI card shows
+  running/total strategies, open orders, total realised PnL (server-exact, no
+  client-side math) and the next scheduled tick (ui-ux-overhaul leaf 03).
 
 ### Fixed
 
diff --git a/doc/dev/plans/ui-ux-overhaul/00-plan.md b/doc/dev/plans/ui-ux-overhaul/00-plan.md
index 8ce88a14..ec5137ed 100644
--- a/doc/dev/plans/ui-ux-overhaul/00-plan.md
+++ b/doc/dev/plans/ui-ux-overhaul/00-plan.md
@@ -55,7 +55,7 @@ ever parsed back into a computation.
 
 - [x] 01 api-read-model — feat/ui-api-read-model — medium
 - [x] 02 formatters — feat/ui-formatters — medium
-- [ ] 03 overview-groups — feat/ui-overview-groups — low
+- [x] 03 overview-groups — feat/ui-overview-groups — low
 - [ ] 04 cadence — feat/ui-cadence — medium
 - [ ] 05 tables-polish — feat/ui-tables-polish — medium
 
diff --git a/doc/dev/plans/ui-ux-overhaul/03-overview-groups.md b/doc/dev/plans/ui-ux-overhaul/03-overview-groups.md
index 33b11f04..40fe42a2 100644
--- a/doc/dev/plans/ui-ux-overhaul/03-overview-groups.md
+++ b/doc/dev/plans/ui-ux-overhaul/03-overview-groups.md
@@ -1,12 +1,12 @@
 ---
 plan: ui-ux-overhaul/03-overview-groups
 kind: leaf
-status: planned
+status: done
 complexity: low
 depends: [02]
 parallel: false
 branch: feat/ui-overview-groups
-pr: ""
+pr: "https://github.com/ArthurBernard/Trading_Bot/pull/161"
 ---
 
 # Leaf 03 — Overview: positions by strategy + summary strip
diff --git a/trading_bot/interfaces/ui/templates/overview.html b/trading_bot/interfaces/ui/templates/overview.html
index a53cb818..58770ab4 100644
--- a/trading_bot/interfaces/ui/templates/overview.html
+++ b/trading_bot/interfaces/ui/templates/overview.html
@@ -3,6 +3,18 @@
 {% block content %}
 <h1>Overview</h1>
 
+<!-- Summary strip — running/total strategies, open orders, total realised PnL
+     (the server's exact Decimal total — never computed client-side) and the
+     next scheduled evaluation tick. Refreshed alongside the rest of the page. -->
+<section class="card" id="summary-card">
+  <div class="row" id="summary-strip">
+    <span class="chip"><b id="sum-running">—</b>/<b id="sum-total">—</b> strategies running</span>
+    <span class="chip"><b id="sum-open-orders">—</b> open orders</span>
+    <span class="chip" title="Total realised PnL across every running strategy">total PnL <b id="sum-pnl">—</b></span>
+    <span class="chip">next check <b id="sum-next-tick">—</b></span>
+  </div>
+</section>
+
 <!-- KPI strip — a level toggle (strategy / exchange / total) over the merged
      PnL / fees / ratios. The buttons refetch /api/kpi?level=. -->
 <section class="card" id="kpi-card">
@@ -34,21 +46,25 @@ <h2 style="margin:0;">Performance</h2>
   </div>
 </section>
 
-<!-- Positions — a group-by control (none / crypto / exchange). -->
+<!-- Positions — a group-by control (none / strategy / crypto / exchange), by
+     strategy by default so the page answers "how is each strategy doing?" at a
+     glance. Grouping by strategy drops the now-redundant Strategy column from
+     both the header and the row cells (the group header already names it); the
+     <thead> is rebuilt in JS per grouping mode to keep colspans consistent. -->
 <section class="card" id="positions-card">
   <div class="row" style="justify-content:space-between;">
     <h2 style="margin:0;">Positions</h2>
     <div class="row" id="pos-groups" role="tablist" aria-label="Group positions by">
-      <button type="button" class="btn pos-group is-active" data-group="">Flat</button>
+      <button type="button" class="btn pos-group" data-group="">Flat</button>
+      <button type="button" class="btn pos-group is-active" data-group="strategy">By strategy</button>
       <button type="button" class="btn pos-group" data-group="crypto">By crypto</button>
       <button type="button" class="btn pos-group" data-group="exchange">By exchange</button>
     </div>
   </div>
   <div class="table-wrap">
     <table id="positions-table">
-      <thead>
+      <thead id="positions-thead">
         <tr>
-          <th>Strategy</th>
           <th>Exchange</th>
           <th>Instrument</th>
           <th class="num">Net qty</th>
@@ -58,7 +74,7 @@ <h2 style="margin:0;">Positions</h2>
         </tr>
       </thead>
       <tbody id="positions-body">
-        <tr class="empty"><td colspan="7">Loading…</td></tr>
+        <tr class="empty"><td colspan="6">Loading…</td></tr>
       </tbody>
     </table>
   </div>
@@ -97,9 +113,30 @@ <h2>Open orders</h2>
   // and format.js's tbFmt.*Cell() helpers (rounded, unit-labelled, exact value
   // on hover — quote/base derived client-side from each row's instrument).
 
-  // Current selections (mirrored on the toggle buttons).
-  let KPI_LEVEL = 'strategy';
-  let POS_GROUP = '';  // '' = flat, else 'crypto' | 'exchange'
+  // Current selections (mirrored on the toggle buttons), persisted across
+  // reloads in localStorage — restored on load, tolerating an absent or
+  // no-longer-valid stored value (falls back to the default below).
+  const POS_GROUP_KEY = 'tb.overview.posGroup';
+  const KPI_LEVEL_KEY = 'tb.overview.kpiLevel';
+  const POS_GROUPS = ['', 'strategy', 'crypto', 'exchange'];
+  const KPI_LEVELS = ['strategy', 'exchange', 'total'];
+
+  function loadPref(key, allowed, fallback) {
+    try {
+      const v = localStorage.getItem(key);
+      return allowed.indexOf(v) !== -1 ? v : fallback;
+    } catch (e) {
+      return fallback;  // storage disabled (e.g. private browsing) — use the default
+    }
+  }
+  function savePref(key, value) {
+    try { localStorage.setItem(key, value); } catch (e) { /* ignore — in-memory state still works */ }
+  }
+
+  // 'strategy' by default — "how is each strategy doing?" is the page's
+  // headline question, so positions open grouped by strategy.
+  let KPI_LEVEL = loadPref(KPI_LEVEL_KEY, KPI_LEVELS, 'strategy');
+  let POS_GROUP = loadPref(POS_GROUP_KEY, POS_GROUPS, 'strategy');  // '' = flat
 
   // A signed-money cell class: green for a gain, red for a loss.
   function pnlClass(v) {
@@ -110,6 +147,69 @@ <h2>Open orders</h2>
     return '';
   }
 
+  // --- Summary strip ------------------------------------------------------ //
+  // Running/total strategies, open orders (reusing loadOrders()'s already-
+  // fetched payload — see below), total realised PnL, and the next tick.
+
+  async function loadSummaryStrategies() {
+    const totalEl = document.getElementById('sum-total');
+    const runningEl = document.getElementById('sum-running');
+    try {
+      const list = await api('GET', '/api/strategies');
+      totalEl.textContent = list.length;
+      runningEl.textContent = list.filter(function (s) { return s.running; }).length;
+    } catch (e) {
+      totalEl.textContent = '—';
+      runningEl.textContent = '—';
+    }
+  }
+
+  // Total realised PnL from /api/kpi?level=total — always exactly one row (a
+  // zero total even with nothing running), rendered via tbFmt.moneyCell with
+  // its quote (null quote -> no suffix + "mixed quote currencies" tooltip).
+  // No client-side money arithmetic — the server's exact Decimal total is the
+  // only source.
+  async function loadSummaryPnl() {
+    const pnlEl = document.getElementById('sum-pnl');
+    try {
+      const rows = await api('GET', '/api/kpi?level=total');
+      const total = rows[0];
+      if (total) {
+        pnlEl.className = pnlClass(total.realised_pnl);
+        pnlEl.innerHTML = tbFmt.moneyCell(total.realised_pnl, { quote: total.quote });
+      } else {
+        pnlEl.className = '';
+        pnlEl.textContent = '—';
+      }
+    } catch (e) {
+      pnlEl.className = '';
+      pnlEl.textContent = '—';
+    }
+  }
+
+  // A compact "in Xs/Xm/Xh" label from /api/health's next_tick_ts (epoch ms),
+  // recomputed at each refresh — a static render only; the live 1-second
+  // countdown is leaf 04's job.
+  function nextTickLabel(nextTickTs) {
+    if (nextTickTs == null) return '—';
+    const deltaS = Math.round((nextTickTs - Date.now()) / 1000);
+    if (deltaS <= 0) return 'due now';
+    if (deltaS < 60) return 'in ' + deltaS + 's';
+    const deltaM = Math.round(deltaS / 60);
+    if (deltaM < 60) return 'in ' + deltaM + 'm';
+    return 'in ' + Math.round(deltaM / 60) + 'h';
+  }
+
+  async function loadSummaryNextTick() {
+    const el = document.getElementById('sum-next-tick');
+    try {
+      const h = await api('GET', '/api/health');
+      el.textContent = nextTickLabel(h.next_tick_ts);
+    } catch (e) {
+      el.textContent = '—';
+    }
+  }
+
   // --- KPI strip --------------------------------------------------------- //
   async function loadKpi() {
     const head = document.getElementById('kpi-key-head');
@@ -144,10 +244,24 @@ <h2>Open orders</h2>
   }
 
   // --- Positions --------------------------------------------------------- //
-  function positionRowHtml(r) {
+  // The Strategy column is redundant when grouping by strategy (the group
+  // header already names it) — dropped from both the header and the row cells,
+  // with the <thead> rebuilt per grouping mode so colspans stay consistent.
+  function positionsTheadHtml(includeStrategy) {
+    return '<tr>' +
+      (includeStrategy ? '<th>Strategy</th>' : '') +
+      '<th>Exchange</th>' +
+      '<th>Instrument</th>' +
+      '<th class="num">Net qty</th>' +
+      '<th class="num">Avg entry</th>' +
+      '<th class="num">Realised PnL</th>' +
+      '<th class="num">Fees</th>' +
+      '</tr>';
+  }
+  function positionRowHtml(r, includeStrategy) {
     const unit = tbFmt.splitInstrument(r.instrument);  // {base, quote}
     return '<tr>' +
-      '<td>' + escapeHtml(r.strategy) + '</td>' +
+      (includeStrategy ? '<td>' + escapeHtml(r.strategy) + '</td>' : '') +
       '<td>' + escapeHtml(r.exchange) + '</td>' +
       '<td>' + escapeHtml(r.instrument) + '</td>' +
       '<td class="num">' + tbFmt.qtyCell(r.net_qty, { base: unit.base }) + '</td>' +
@@ -163,6 +277,9 @@ <h2>Open orders</h2>
       '<span class="group-count">' + count + '</span></td></tr>';
   }
   async function loadPositions() {
+    const includeStrategy = POS_GROUP !== 'strategy';
+    const colspan = includeStrategy ? 7 : 6;
+    document.getElementById('positions-thead').innerHTML = positionsTheadHtml(includeStrategy);
     let data;
     const url = POS_GROUP
       ? '/api/positions?group_by=' + encodeURIComponent(POS_GROUP)
@@ -171,7 +288,7 @@ <h2>Open orders</h2>
       data = await api('GET', url);
     } catch (e) {
       document.getElementById('positions-body').innerHTML =
-        '<tr class="empty"><td colspan="7">' + escapeHtml(e.message) + '</td></tr>';
+        '<tr class="empty"><td colspan="' + colspan + '">' + escapeHtml(e.message) + '</td></tr>';
       return;
     }
     const body = document.getElementById('positions-body');
@@ -179,19 +296,19 @@ <h2>Open orders</h2>
     if (POS_GROUP) {
       // Grouped: [{group, rows}] — a header row per bucket.
       if (!data.length) {
-        body.innerHTML = '<tr class="empty"><td colspan="7">No open positions.</td></tr>';
+        body.innerHTML = '<tr class="empty"><td colspan="' + colspan + '">No open positions.</td></tr>';
         return;
       }
       data.forEach(function (g) {
-        html += groupHeaderHtml(g.group, g.rows.length, 7);
-        html += g.rows.map(positionRowHtml).join('');
+        html += groupHeaderHtml(g.group, g.rows.length, colspan);
+        html += g.rows.map(function (r) { return positionRowHtml(r, includeStrategy); }).join('');
       });
     } else {
       if (!data.length) {
-        body.innerHTML = '<tr class="empty"><td colspan="7">No open positions.</td></tr>';
+        body.innerHTML = '<tr class="empty"><td colspan="' + colspan + '">No open positions.</td></tr>';
         return;
       }
-      html = data.map(positionRowHtml).join('');
+      html = data.map(function (r) { return positionRowHtml(r, includeStrategy); }).join('');
     }
     body.innerHTML = html;
   }
@@ -204,8 +321,11 @@ <h2>Open orders</h2>
     } catch (e) {
       document.getElementById('orders-body').innerHTML =
         '<tr class="empty"><td colspan="8">' + escapeHtml(e.message) + '</td></tr>';
+      document.getElementById('sum-open-orders').textContent = '—';
       return;
     }
+    // Feeds the summary strip's open-orders count — no separate fetch for it.
+    document.getElementById('sum-open-orders').textContent = rows.length;
     const body = document.getElementById('orders-body');
     if (!rows.length) {
       body.innerHTML = '<tr class="empty"><td colspan="8">No open orders.</td></tr>';
@@ -228,31 +348,43 @@ <h2>Open orders</h2>
   }
 
   function refreshAll() {
+    loadSummaryStrategies();
+    loadSummaryPnl();
+    loadSummaryNextTick();
     loadKpi();
     loadPositions();
     loadOrders();
   }
 
+  // Reflect KPI_LEVEL / POS_GROUP (restored from localStorage, or the default)
+  // onto the toggle buttons' is-active state.
+  function syncToggleButtons() {
+    document.querySelectorAll('.kpi-level').forEach(function (b) {
+      b.classList.toggle('is-active', b.dataset.level === KPI_LEVEL);
+    });
+    document.querySelectorAll('.pos-group').forEach(function (b) {
+      b.classList.toggle('is-active', b.dataset.group === POS_GROUP);
+    });
+  }
+
   document.addEventListener('DOMContentLoaded', function () {
+    syncToggleButtons();  // apply the restored (or default) preferences
+
     // KPI level toggle.
     document.querySelectorAll('.kpi-level').forEach(function (btn) {
       btn.addEventListener('click', function () {
-        document.querySelectorAll('.kpi-level').forEach(function (b) {
-          b.classList.remove('is-active');
-        });
-        btn.classList.add('is-active');
         KPI_LEVEL = btn.dataset.level;
+        savePref(KPI_LEVEL_KEY, KPI_LEVEL);
+        syncToggleButtons();
         loadKpi();
       });
     });
     // Positions group-by control.
     document.querySelectorAll('.pos-group').forEach(function (btn) {
       btn.addEventListener('click', function () {
-        document.querySelectorAll('.pos-group').forEach(function (b) {
-          b.classList.remove('is-active');
-        });
-        btn.classList.add('is-active');
         POS_GROUP = btn.dataset.group;
+        savePref(POS_GROUP_KEY, POS_GROUP);
+        syncToggleButtons();
         loadPositions();
       });
     });
diff --git a/trading_bot/tests/interfaces/test_dashboard.py b/trading_bot/tests/interfaces/test_dashboard.py
index 8cb35536..f5fbc096 100644
--- a/trading_bot/tests/interfaces/test_dashboard.py
+++ b/trading_bot/tests/interfaces/test_dashboard.py
@@ -865,7 +865,20 @@ def test_overview_page_has_kpi_strip_and_tables() -> None:
     assert 'id="positions-table"' in html
     assert "pos-group" in html  # the group-by control
     assert 'data-group="crypto"' in html and 'data-group="exchange"' in html
+    # The "By strategy" grouping is present and the default (ui-ux leaf 03).
+    assert 'data-group="strategy"' in html
+    assert 'class="btn pos-group is-active" data-group="strategy"' in html
     assert 'id="orders-table"' in html
+    # The summary strip (running/total strategies, open orders, total PnL, next
+    # tick) sits above the KPI card.
+    assert 'id="summary-strip"' in html
+    assert 'id="sum-running"' in html and 'id="sum-total"' in html
+    assert 'id="sum-open-orders"' in html
+    assert 'id="sum-pnl"' in html
+    assert 'id="sum-next-tick"' in html
+    # View preferences persist across reloads.
+    assert "tb.overview.posGroup" in html
+    assert "tb.overview.kpiLevel" in html
     # It wires the merged SSE stream + polling fallback.
     assert "/api/events" in html
     assert "/api/positions" in html