diff --git a/src/PolyTrader.Modules.CopyTrading/Logic/FeeModel.cs b/src/PolyTrader.Core/Trading/FeeModel.cs
similarity index 80%
rename from src/PolyTrader.Modules.CopyTrading/Logic/FeeModel.cs
rename to src/PolyTrader.Core/Trading/FeeModel.cs
index bff3e64..bbef12b 100644
--- a/src/PolyTrader.Modules.CopyTrading/Logic/FeeModel.cs
+++ b/src/PolyTrader.Core/Trading/FeeModel.cs
@@ -1,10 +1,11 @@
-namespace PolyTrader.Modules.CopyTrading.Logic
+namespace PolyTrader.Core.Trading
 {
     /// <summary>
-    /// Reine Fee-Logik (Phase 0.2). Polymarket erhebt seit März 2026 Taker-Fees (Maker zahlen 0).
-    /// Der reale Satz kommt idealerweise vom Markt-Objekt der CLOB-/Gamma-API (Feldname im Zielland
-    /// anhand https://docs.polymarket.com/trading/fees verifizieren); bis dahin greift die
-    /// Kategorie-Fallback-Tabelle. Werte in Basispunkten (bps): 100 bps = 1,0 %.
+    /// Reine Fee-Logik (geteilte Markt-Infrastruktur im Core – von mehreren Strategiemodulen genutzt).
+    /// Polymarket erhebt seit März 2026 Taker-Fees (Maker zahlen 0). Der reale Satz kommt idealerweise
+    /// vom Markt-Objekt der CLOB-/Gamma-API (Feldname im Zielland anhand
+    /// https://docs.polymarket.com/trading/fees verifizieren); bis dahin greift die Kategorie-Fallback-
+    /// Tabelle. Werte in Basispunkten (bps): 100 bps = 1,0 %.
     /// </summary>
     public static class FeeModel
     {
diff --git a/src/PolyTrader.Modules.CopyTrading/Logic/DemoModel.cs b/src/PolyTrader.Modules.CopyTrading/Logic/DemoModel.cs
index 390e978..a091e3d 100644
--- a/src/PolyTrader.Modules.CopyTrading/Logic/DemoModel.cs
+++ b/src/PolyTrader.Modules.CopyTrading/Logic/DemoModel.cs
@@ -1,4 +1,5 @@
 using System;
+using PolyTrader.Core.Trading;
 
 namespace PolyTrader.Modules.CopyTrading.Logic
 {
diff --git a/src/PolyTrader.Modules.CopyTrading/Services/CopyTradingEngine.cs b/src/PolyTrader.Modules.CopyTrading/Services/CopyTradingEngine.cs
index 9409ca4..341131c 100644
--- a/src/PolyTrader.Modules.CopyTrading/Services/CopyTradingEngine.cs
+++ b/src/PolyTrader.Modules.CopyTrading/Services/CopyTradingEngine.cs
@@ -1,5 +1,6 @@
 using System;
 using PolyTrader.Core.Persistence;
+using PolyTrader.Core.Trading;
 using System.Threading;
 using System.Threading.Channels;
 using System.Threading.Tasks;
diff --git a/src/PolyTrader.Modules.CopyTrading/Services/PolymarketWssClient.cs b/src/PolyTrader.Modules.CopyTrading/Services/PolymarketWssClient.cs
index 6e7ffa0..231ccb3 100644
--- a/src/PolyTrader.Modules.CopyTrading/Services/PolymarketWssClient.cs
+++ b/src/PolyTrader.Modules.CopyTrading/Services/PolymarketWssClient.cs
@@ -1,5 +1,6 @@
 using System;
 using PolyTrader.Core.Persistence;
+using PolyTrader.Core.Trading;
 using PolyTrader.Modules.CopyTrading.Logic;
 using PolyTrader.Modules.CopyTrading.Persistence;
 using System.Collections.Concurrent;
diff --git a/src/PolyTrader.Modules.CopyTrading/Services/SellLadderService.cs b/src/PolyTrader.Modules.CopyTrading/Services/SellLadderService.cs
index 765780f..9bea744 100644
--- a/src/PolyTrader.Modules.CopyTrading/Services/SellLadderService.cs
+++ b/src/PolyTrader.Modules.CopyTrading/Services/SellLadderService.cs
@@ -1,6 +1,7 @@
 using System;
 using System.Linq;
 using System.Threading;
+using PolyTrader.Core.Trading;
 using System.Threading.Tasks;
 using Microsoft.Extensions.Hosting;
 using PolyTrader.Core.Persistence;
diff --git a/src/PolyTrader.Modules.CopyTrading/Services/TraderMonitorService.cs b/src/PolyTrader.Modules.CopyTrading/Services/TraderMonitorService.cs
index 3f76714..5efc028 100644
--- a/src/PolyTrader.Modules.CopyTrading/Services/TraderMonitorService.cs
+++ b/src/PolyTrader.Modules.CopyTrading/Services/TraderMonitorService.cs
@@ -1,5 +1,6 @@
 using System;
 using PolyTrader.Core.Persistence;
+using PolyTrader.Core.Trading;
 using PolyTrader.Modules.CopyTrading.Logic;
 using PolyTrader.Modules.CopyTrading.Persistence;
 using System.Collections.Concurrent;
diff --git a/tests/PolyTrader.Tests/FeeModelTests.cs b/tests/PolyTrader.Tests/FeeModelTests.cs
index 1b26d41..6fba731 100644
--- a/tests/PolyTrader.Tests/FeeModelTests.cs
+++ b/tests/PolyTrader.Tests/FeeModelTests.cs
@@ -1,6 +1,6 @@
-using PolyTrader.Modules.CopyTrading.Logic;
+using PolyTrader.Core.Trading;
 using Xunit;
-using static PolyTrader.Modules.CopyTrading.Logic.FeeModel;
+using static PolyTrader.Core.Trading.FeeModel;
 
 namespace PolyTrader.Tests
 {