diff --git a/Optiver/assignment/Basic Quoter.ipynb b/Optiver/assignment/Basic Quoter.ipynb
index 0ba3a18..0311038 100644
--- a/Optiver/assignment/Basic Quoter.ipynb	
+++ b/Optiver/assignment/Basic Quoter.ipynb	
@@ -70,37 +70,22 @@
     "        # Wait for some time to avoid breaching the exchange frequency limit\n",
     "        time.sleep(0.05)\n",
     "\n",
-    "def vwap_mid_from_top_levels(bids, asks, depth=3):\n",
+    "def microprice_top1(bids, asks):\n",
     "    \"\"\"\n",
-    "    Berechnet den VWAP-basierten Mid-Preis auf Grundlage\n",
-    "    der obersten 'depth' Level in bids und asks.\n",
-    "\n",
-    "    Parameter:\n",
-    "    - bids: List[OrderBookLevel], sortiert nach fallendem Preis\n",
-    "    - asks: List[OrderBookLevel], sortiert nach steigendem Preis\n",
-    "    - depth: int, Anzahl der Level pro Seite, die berücksichtigt werden\n",
-    "\n",
-    "    Rückgabe:\n",
-    "    - float oder None (falls total_volume == 0)\n",
+    "    Berechnet den Microprice auf Basis des Top-1 Bid- und Ask-Levels:\n",
+    "    (Ask Price * Bid Size + Bid Price * Ask Size) / (Bid Size + Ask Size)\n",
+    "    Fallback auf einfachen Mittelwert, falls (Bid Size + Ask Size) == 0.\n",
     "    \"\"\"\n",
-    "    total_volume = 0\n",
-    "    weighted_sum = 0\n",
-    "\n",
-    "    # Falls das Orderbuch weniger als 'depth' Ebenen aufweist, automatisch anpassen\n",
-    "    actual_depth = min(depth, len(bids), len(asks))\n",
-    "\n",
-    "    for level in bids[:actual_depth]:\n",
-    "        weighted_sum += level.price * level.volume\n",
-    "        total_volume += level.volume\n",
-    "\n",
-    "    for level in asks[:actual_depth]:\n",
-    "        weighted_sum += level.price * level.volume\n",
-    "        total_volume += level.volume\n",
-    "\n",
-    "    if total_volume == 0:\n",
+    "    if not bids or not asks:\n",
     "        return None\n",
-    "\n",
-    "    return weighted_sum / total_volume"
+    "    bid_price = bids[0].price\n",
+    "    ask_price = asks[0].price\n",
+    "    bid_size = bids[0].volume\n",
+    "    ask_size = asks[0].volume\n",
+    "    total_size = bid_size + ask_size\n",
+    "    if total_size == 0:\n",
+    "        return None\n",
+    "    return ((ask_price * bid_size) + (bid_price * ask_size)) / total_size"
    ]
   },
   {
@@ -143,8 +128,7 @@
     "        # Remove all existing (still) outstanding limit orders\n",
     "        exchange.delete_orders(instrument.instrument_id)\n",
     "    \n",
-    "        # Obtain order book and only skip this instrument if there are no bids or offers available at all on that instrument,\n",
-    "        # as we want to decide zwischen einfachem Mid oder VWAP-basiertem Mid\n",
+    "        # Obtain order book; skip if incomplete\n",
     "        instrument_order_book = exchange.get_last_price_book(instrument.instrument_id)\n",
     "        if not (instrument_order_book and instrument_order_book.bids and instrument_order_book.asks):\n",
     "            print(f'{instrument.instrument_id:>6s} --     INCOMPLETE ORDER BOOK')\n",
@@ -153,32 +137,18 @@
     "        # Obtain own current position in instrument\n",
     "        position = exchange.get_positions()[instrument.instrument_id]\n",
     "\n",
-    "        # Obtain best bid and ask prices from order book (für Anzeige)\n",
+    "        # Obtain best bid and ask for display\n",
     "        best_bid_price = instrument_order_book.bids[0].price\n",
     "        best_ask_price = instrument_order_book.asks[0].price\n",
     "\n",
-    "        # Berechne Volumina der Top-3-Level je Seite\n",
-    "        bid_vol_top3 = sum(level.volume for level in instrument_order_book.bids[:3])\n",
-    "        ask_vol_top3 = sum(level.volume for level in instrument_order_book.asks[:3])\n",
-    "        use_simple_mid = False\n",
-    "\n",
-    "        if bid_vol_top3 + ask_vol_top3 > 0:\n",
-    "            rel_diff = abs(bid_vol_top3 - ask_vol_top3) / max(bid_vol_top3, ask_vol_top3)\n",
-    "            # Wenn sich die Top-Volumina um weniger als 10% unterscheiden, einfachen Mid verwenden\n",
-    "            if rel_diff < 0.10:\n",
-    "                use_simple_mid = True\n",
-    "\n",
-    "        if use_simple_mid:\n",
+    "        # Berechne Microprice (Top-1)\n",
+    "        mid_price = microprice_top1(\n",
+    "            instrument_order_book.bids,\n",
+    "            instrument_order_book.asks\n",
+    "        )\n",
+    "        if mid_price is None:\n",
+    "            # Fallback: einfacher Mid, falls Microprice nicht berechenbar\n",
     "            mid_price = (best_bid_price + best_ask_price) / 2.0\n",
-    "        else:\n",
-    "            mid_price = vwap_mid_from_top_levels(\n",
-    "                instrument_order_book.bids,\n",
-    "                instrument_order_book.asks,\n",
-    "                depth=3\n",
-    "            )\n",
-    "            if mid_price is None:\n",
-    "                print(f'{instrument.instrument_id:>6s} --     VWAP MID PRICE NOT COMPUTABLE')\n",
-    "                continue\n",
     "\n",
     "        # Calculate our fair/theoretical price based on the chosen mid_price and our current position\n",
     "        theoretical_price = mid_price - PRICE_RETREAT_PER_LOT * position\n",